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Oocyte

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average somatic cell, and thus considerable metabolic activity is necessary for their provisioning. If this metabolic activity were carried out by the oocyte's metabolic machinery, the oocyte genome would be exposed to the reactive oxidative by-products generated. Thus it appears that a process evolved to avoid this vulnerability of germline DNA. It was proposed that, in order to avoid damage to the DNA genome of the oocytes, the metabolism contributing to the synthesis of much of the oocyte's constituents was shifted to other maternal cells that then transferred these constituents to oocytes. Thus, oocytes of many organisms are protected from oxidative DNA damage while storing up a large mass of substances to nurture the zygote in its initial embryonic growth.
729: 461: 785:. In mammalian oocytes, maternally derived ribosomes and some mRNAs are stored in a structure called cytoplasmic lattices. These cytoplasmic lattices, a network of fibrils, protein, and RNAs, have been observed to increase in density as the number of ribosomes decrease within a growing oocyte and mutation in them have been linked to infertility. 206: 498:, are supplied by maternal cells. These mRNAs can be stored in mRNP (message ribonucleoprotein) complexes and be translated at specific time points, they can be localized within a specific region of the cytoplasm, or they can be homogeneously dispersed within the cytoplasm of the entire oocyte. Maternally loaded 873:
During fertilization, the sperm provides three essential parts to the oocyte: (1) a signalling or activating factor, which causes the metabolically dormant oocyte to activate; (2) the haploid paternal genome; (3) the centrosome, which is responsible for maintaining the microtubule system. See anatomy
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The DNA of a cell is vulnerable to the damaging effect of oxidative free radicals produced as byproducts of cellular metabolism. DNA damage occurring in oocytes, if not repaired, can be lethal and result in reduced fecundity and loss of potential progeny. Oocytes are substantially larger than the
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In order for an oocyte to become fertilized and ultimately grow into a fully functioning organism, it must be able to regulate multiple cellular and developmental processes. The oocyte, a large and complex cell, must be able to direct the growth of the embryo and control cellular activities. As the
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goes through a structural change known as cumulus expansion. The granulosa cells transform from tightly compacted to an expanded mucoid matrix. Many studies show that cumulus expansion is critical for the maturation of the oocyte because the cumulus complex is the oocyte's direct communication with
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can also be localized or ubiquitous throughout the cytoplasm. The translated products of the mRNAs and the loaded proteins have multiple functions; from regulation of cellular "house-keeping" such as cell cycle progression and cellular metabolism, to regulation of developmental processes such as
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of the oocyte is derived solely from maternal cells. The nucleolus, a structure found within the nucleus, is the location where rRNA is transcribed and assembled into ribosomes. While the nucleolus is dense and inactive in a mature oocyte, it is required for proper development of the embryo.
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that will localize mitochondria throughout the oocyte. In certain organisms, such as mammals, paternal mitochondria brought to the oocyte by the spermatozoon are degraded through the attachment of ubiquitinated proteins. The destruction of paternal mitochondria ensures the strictly maternal
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Jentoft, Ida M.A.; Bäuerlein, Felix J.B.; Welp, Luisa M.; Cooper, Benjamin H.; Petrovic, Arsen; So, Chun; Penir, Sarah Mae; Politi, Antonio Z.; Horokhovskyi, Yehor; Takala, Iina; Eckel, Heike; Moltrecht, Rüdiger; Lénárt, Peter; Cavazza, Tommaso; Liepe, Juliane (November 2023).
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required for the first division. However, in some species, such as in the mouse, the entire centrosome is acquired maternally. Currently under investigation is the possibility of other cytoplasmic contributions made to the embryo by the spermatozoon.
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The cumulus-oocyte complex contains layers of tightly packed cumulus cells surrounding the oocyte in the Graafian follicle. The oocyte is arrested in Meiosis II at the stage of metaphase II and is considered a secondary oocyte. Before ovulation, the
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Grier HJ, Uribe MC, Parenti LR (April 2007). "Germinal epithelium, folliculogenesis, and postovulatory follicles in ovaries of rainbow trout, Oncorhynchus mykiss (Walbaum, 1792) (Teleostei, protacanthopterygii, salmoniformes)".
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Zhang J, King ML (December 1996). "Xenopus VegT RNA is localized to the vegetal cortex during oogenesis and encodes a novel T-box transcription factor involved in mesodermal patterning".
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The only normal human type of secondary oocyte has the 23rd (sex) chromosome as 23,X (female-determining), whereas sperm can have 23,X (female-determining) or 23,Y (male-determining).
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Tanghe S, Van Soom A, Nauwynck H, Coryn M, de Kruif A (March 2002). "Minireview: Functions of the cumulus oophorus during oocyte maturation, ovulation, and fertilization".
507:, activation of zygotic transcription, and formation of body axes. Below are some examples of maternally inherited mRNAs and proteins found in the oocytes of the 452:
the developing follicle environment. It also plays a significant role in fertilization, though the mechanisms are not entirely known and are species specific.
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Ogushi S, Palmieri C, Fulka H, Saitou M, Miyano T, Fulka J (February 2008). "The maternal nucleolus is essential for early embryonic development in mammals".
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Song J, Slack JM (December 1994). "Spatial and temporal expression of basic fibroblast growth factor (FGF-2) mRNA and protein in early Xenopus development".
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from maternal cells, which will go on to control embryonic metabolism and apoptotic events. The partitioning of mitochondria is carried out by a system of
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Female mammals and birds are born possessing all the oocytes needed for future ovulations, and these oocytes are arrested at the prophase I stage of
1674:"XPACE4 is a localized pro-protein convertase required for mesoderm induction and the cleavage of specific TGFbeta proteins in Xenopus development" 931: 809:
are present in the oocytes. The arrest of ooctyes at the four genome copy stage appears to provide the informational redundancy needed to
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Leem J, Lee C, Choi DY, Oh JS. Distinct characteristics of the DNA damage response in mammalian oocytes. Exp Mol Med. 2024 Feb 14.
1851:"Role for PADI6 and the cytoplasmic lattices in ribosomal storage in oocytes and translational control in the early mouse embryo" 951: 2219: 2182: 1199: 1082: 837:. DNA repair capability appears to be a key quality control mechanism in the female germ line and a critical determinant of 231:
The formation of an oocyte is called oocytogenesis, which is a part of oogenesis. Oogenesis results in the formation of both
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He, Da-Jian; Wang, Lin; Zhang, Zhi-Bi; Guo, Kun; Li, Jing-Zheng; He, Xie-Chao; Cui, Qing-Hua; Zheng, Ping (2018-11-18).
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Sutovsky P, Schatten G (2000). "Paternal contributions to the mammalian zygote: fertilization after sperm-egg fusion".
2038:"Oocytes can efficiently repair DNA double-strand breaks to restore genetic integrity and protect offspring health" 826: 822: 17: 1368:"Xenopus X-box binding protein 1, a leucine zipper transcription factor, is involved in the BMP signaling pathway" 3012: 1224: 2684: 1190:
Bernstein C (1993). "Sex as a response to oxidative DNA damage. Chapter 10". In Halliwell B, Aruoma OI (eds.).
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Bernstein C (1998). "Sex as a response to oxidative DNA damage. Chapter 4". In Aruoma OI, Halliwell B (eds.).
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Takebayashi-Suzuki K, Funami J, Tokumori D, Saito A, Watabe T, Miyazono K, et al. (September 2003).
941: 193:, the oogonia become primary oocytes. An oocyte is a form of genetic material that can be collected for 2860: 2433: 2303: 834: 2588: 3230: 3110: 3075: 2969: 782: 3125: 3090: 2962: 2754: 2538: 1151:"The human oocyte and cumulus cells relationship: new insights from the cumulus cell transcriptome" 830: 818: 43: 2935: 3115: 3080: 2940: 2528: 2523: 166: 1247:
Mtango NR, Potireddy S, Latham KE (2008). "Oocyte quality and maternal control of development".
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Yurttas P, Vitale AM, Fitzhenry RJ, Cohen-Gould L, Wu W, Gossen JA, Coonrod SA (August 2008).
1756:"The maternally localized RNA fatvg is required for cortical rotation and germ cell formation" 3265: 3260: 3017: 2774: 1615:"Germ-layer specification and control of cell growth by Ectodermin, a Smad4 ubiquitin ligase" 906: 801:
within the fetus and are therefore present at birth. During this prophase I arrested stage (
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Birsoy B, Berg L, Williams PH, Smith JC, Wylie CC, Christian JL, Heasman J (February 2005).
992: 2815: 2795: 2769: 2351: 2049: 1997: 1715:"Cell fate specification and competence by Coco, a maternal BMP, TGFbeta and Wnt inhibitor" 956: 2915: 1613:
Dupont S, Zacchigna L, Cordenonsi M, Soligo S, Adorno M, Rugge M, Piccolo S (April 2005).
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Yokoo M, Sato E (2004). "Cumulus-oocyte complex interactions during oocyte maturation".
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During the growth of the oocyte, a variety of maternally transcribed messenger RNAs, or
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During the primary oocyte stage of oogenesis, the nucleus is called a germinal vesicle.
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Kofron M, Puck H, Standley H, Wylie C, Old R, Whitman M, Heasman J (October 2004).
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repair. Prophase arrested oocytes have a high capability for efficient repair of
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Proceedings of the National Academy of Sciences of the United States of America
1953: 1917: 1901:"Mammalian oocytes store proteins for the early embryo on cytoplasmic lattices" 1900: 1631: 1614: 886: 435: 1771: 3323: 3240: 3137: 2843: 2838: 2790: 2691: 2491: 2378: 2373: 2356: 2272: 898: 748: 504: 495: 470: 370: 344: 311: 285: 170: 3065: 2848: 2062: 1819: 1295: 1167: 1150: 3255: 3250: 2957: 2910: 2709: 2192: 2130: 2081: 2009: 1961: 1926: 1884: 1827: 1789: 1740: 1699: 1650: 1556: 1535:
Heasman J (February 2006). "Maternal determinants of embryonic cell fate".
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Bell E, Muñoz-Sanjuán I, Altmann CR, Vonica A, Brivanlou AH (April 2003).
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Heasman J, Wessely O, Langland R, Craig EJ, Kessler DS (December 2001).
73: 2979: 2905: 2719: 2601: 1866: 1327:"Vegetal localization of maternal mRNAs is disrupted by VegT depletion" 1031: 946: 894: 866: 854: 810: 261: 158: 2701: 1942:"New explanation for infertility: eggs lacking a mysterious 'lattice'" 1731: 1714: 1690: 1673: 1507: 1490: 1466: 1449: 1119: 728: 2879: 2470: 2311: 1488: 890: 862: 838: 798: 765: 412: 240: 226: 190: 178: 162: 1409:"The role of maternal CREB in early embryogenesis of Xenopus laevis" 2989: 2558: 2478: 814: 802: 778: 325: 274: 186: 174: 2036:
Stringer JM, Winship A, Zerafa N, Wakefield M, Hutt K (May 2020).
3186: 1848: 794: 499: 374: 348: 315: 289: 218: 182: 2214:(7th ed.). Freeman, W. H. & Company. pp. 823–824. 1219:. Saint Lucia and London: OICA International. pp. 112–113. 1217:
DNA and Free Radicals: Techniques, Mechanisms & Applications
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Chan AP, Kloc M, Larabell CA, LeGros M, Etkin LD (May 2007).
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that are required for the translation of proteins before the
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The space within an ovum or immature ovum is located is the
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inheritance of mitochondria and mitochondrial DNA (mtDNA).
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Maternal cells also synthesize and contribute a store of
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Sundaram N, Tao Q, Wylie C, Heasman J (September 2003).
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can be repaired during the period of prophase arrest by
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Micrograph of a primary oocyte and follicle of a monkey
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Mira A (September 1998). "Why is meiosis arrested?".
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Biology Articles, Tutorials & Dictionary Online
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List of distinct cell types in the adult human body
135: 100: 2210:Purves WK, Orians GH, Sadava D, Heller HC (2004). 1249:International Review of Cell and Molecular Biology 1016: 3321: 2160: 2031: 2029: 2027: 209:Diagram showing the reduction in number of the 2302: 2094: 853:that fertilizes an oocyte will contribute its 2288: 2024: 1939: 1537:Seminars in Cell & Developmental Biology 1365: 932:Cryoconservation of animal genetic resources 1983: 1981: 1979: 916:, although it is thought they never mature. 817:. The repair process used likely involves 354:Halted in metaphase II until fertilization 2295: 2281: 1530: 1528: 1526: 1148: 722:Germ cell formation and cortical rotation 2120: 2071: 2061: 1916: 1874: 1801: 1799: 1779: 1730: 1689: 1640: 1630: 1569: 1506: 1465: 1424: 1383: 1342: 1281: 1214: 1189: 1166: 1060: 844: 455: 441: 1976: 1242: 1240: 1238: 1236: 727: 459: 204: 1534: 1523: 952:Symmetry breaking and cortical rotation 14: 3322: 1796: 1108:Molecular Reproduction and Development 865:, which will help make up the zygotic 2276: 1940:Vaidyanathan, Gayathri (2023-11-02). 1233: 893:separation in meiosis II can lead to 489: 3038:Infra-corporeal residual spongy part 2887: 2151:. Epub ahead of print. PMID 38355825 1987: 788: 481:Avoidance of damage to germ-line DNA 213:in the process of maturation of the 1366:Zhao H, Cao Y, Grunz H (May 2003). 24: 2113:10.24272/j.issn.2095-8137.2018.067 905:in humans. It is more likely with 401: 25: 3341: 2229: 1149:Huang Z, Wells D (October 2010). 831:homologous recombinational repair 328:in prophase I for up to 50 years 2163:International Review of Cytology 1063:International Review of Cytology 880: 857:, the other half of the zygotic 131: 96: 3034:Trabeculae of corpora cavernosa 2154: 2137: 2088: 1933: 1891: 1842: 1747: 1706: 1665: 1606: 1563: 1482: 1441: 1400: 1359: 1318: 1275: 742: 1990:Journal of Theoretical Biology 1208: 1183: 1142: 1099: 1054: 1010: 985: 974: 469:oocyte is a product of female 13: 1: 2175:10.1016/s0074-7696(08)62703-5 1426:10.1016/s0012-1606(03)00303-8 1385:10.1016/s0012-1606(03)00069-1 1261:10.1016/S1937-6448(08)00807-1 1075:10.1016/S0074-7696(04)35006-0 967: 2212:Life: The Science of Biology 1584:10.1016/0925-4773(94)90055-8 1549:10.1016/j.semcdb.2005.11.005 1155:Molecular Human Reproduction 772: 759: 708:BMP/Chordin binding protein 406: 380:Minutes after fertilization 239:oocytes after it as part of 235:during fetal period, and of 200: 7: 2252:Stages of human development 942:Oocyte maturation inhibitor 920: 912:Some oocytes have multiple 783:zygotic genome is activated 169:. In other words, it is an 10: 3346: 2304:Female reproductive system 2203: 2149:10.1038/s12276-024-01178-2 1954:10.1038/d41586-023-03415-6 1918:10.1016/j.cell.2023.10.003 1632:10.1016/j.cell.2005.01.033 835:non-homologous end joining 819:homologous recombinational 520:Type of maternal molecule 418: 224: 217:; the process is known as 3276: 3210: 3192:External urethral orifice 3183:Vestibular gland openings 3157: 2988: 2970:Posterior labial arteries 2896: 2878: 2829: 2808: 2783: 2745: 2700: 2635: 2626: 2587: 2557: 2514: 2469: 2421: 2337: 2328: 2319: 2310: 2261: 2249: 2243: 1772:10.1016/j.mod.2007.02.001 1760:Mechanisms of Development 1572:Mechanisms of Development 732:Maternal determinants in 66: 54: 42: 37: 32: 27:Immature ovum or egg cell 3101:Superficial dorsal veins 3091:Internal pudendal artery 827:DNA double-strand breaks 811:repair damage in the DNA 3261:Uterine venous plexuses 3116:Internal pudendal veins 2941:Posterior labial nerves 2063:10.1073/pnas.2001124117 1820:10.1126/science.1151276 1296:10.1242/dev.122.12.4119 429: 2975:Posterior labial veins 2946:Anterior labial nerves 2775:Pubocervical ligaments 2010:10.1006/jtbi.1998.0761 1344:10.1006/dbio.2001.0495 845:Paternal contributions 739: 680:Proprotein convertase 465: 456:Maternal contributions 442:Cumulus-oocyte complex 222: 68:Anatomical terminology 3266:Vaginal venous plexus 2770:Uterosacral ligaments 1911:(24): 5308–5327.e25. 1413:Developmental Biology 1372:Developmental Biology 1331:Developmental Biology 1192:DNA and Free Radicals 1168:10.1093/molehr/gaq031 1020:Journal of Morphology 907:advanced maternal age 731: 699:Twisted gastrulation 624:Transcription factor 610:Transcription Factor 596:Transcription factor 582:Transcription factor 568:Transcription factor 554:Transcription factor 540:Transcription factor 463: 208: 3309:Uterotubal junctions 2931:Posterior commissure 2796:Urogenital diaphragm 2685:Supravaginal portion 2607:Vesicular appendages 2572:Suspensory ligaments 2516:Fallopian tubes 957:Oocyte abnormalities 747:The oocyte receives 411:Oocytes are rich in 179:female gametogenesis 3304:Vesicouterine pouch 3048:Commissure of bulbs 3013:Suspensory ligament 2926:Anterior commissure 2549:Intramural segments 2429:Germinal epithelium 2413:Perivitelline space 2101:Zoological Research 2054:2020PNAS..11711513S 2048:(21): 11513–11522. 2002:1998JThBi.194..275M 719:Vegetal hemisphere 677:Vegetal hemisphere 551:Vegetal hemisphere 537:Vegetal hemisphere 509:African clawed frog 269:Time of completion 3299:Rectouterine pouch 3018:Fundiform ligament 2861:Support structures 2816:Bartholin's glands 2765:Cardinal ligaments 2577:Pampiniform plexus 2408:Membrana granulosa 1867:10.1242/dev.016329 1032:10.1002/jmor.10518 993:"Germinal vesicle" 825:. In particular, 740: 663:Animal hemisphere 490:mRNAs and proteins 466: 223: 3317: 3316: 3206: 3205: 3202: 3201: 3106:Deep dorsal veins 3086:Arteries of bulbs 3030:Corpora cavernosa 2980:Interlabial sulci 2921:Labiocrural folds 2874: 2873: 2809:Vestibular glands 2804: 2803: 2622: 2621: 2589:Wolffian vestiges 2567:Ovarian ligaments 2510: 2509: 2386:Follicular antrum 2271: 2270: 2262:Succeeded by 2221:978-0-7167-9856-9 2184:978-0-12-364599-9 1732:10.1242/dev.00344 1691:10.1242/dev.01599 1508:10.1242/dev.00615 1467:10.1242/dev.01396 1201:978-0-13-222035-4 1120:10.1002/mrd.10102 1084:978-0-12-364639-2 789:Prophase I arrest 726: 725: 666:Ubiquitin ligase 643:FGF2, 4, 9 FGFR1 399: 398: 82: 81: 77: 16:(Redirected from 3337: 3221:Ovarian arteries 3147:Tunica albuginea 2936:Dartos muliebris 2894: 2893: 2885: 2884: 2633: 2632: 2444:Cumulus oophorus 2434:Tunica albuginea 2391:Follicular fluid 2335: 2334: 2326: 2325: 2317: 2316: 2297: 2290: 2283: 2274: 2273: 2244:Preceded by 2241: 2240: 2225: 2197: 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3320: 3319: 3318: 3313: 3294:Perineal sponge 3289:Urethral sponge 3272: 3241:Spiral arteries 3198: 3172:Vaginal orifice 3153: 3076:Dorsal arteries 3053:Pars intermedia 2984: 2870: 2825: 2800: 2779: 2760:Broad ligaments 2755:Round ligaments 2741: 2696: 2618: 2597:Gartner's ducts 2583: 2553: 2506: 2465: 2417: 2306: 2301: 2267: 2255: 2247: 2232: 2222: 2206: 2201: 2200: 2185: 2159: 2155: 2142: 2138: 2093: 2089: 2034: 2025: 1986: 1977: 1938: 1934: 1896: 1892: 1861:(15): 2627–36. 1847: 1843: 1814:(5863): 613–6. 1804: 1797: 1752: 1748: 1711: 1707: 1670: 1666: 1611: 1607: 1568: 1564: 1533: 1524: 1501:(17): 3929–39. 1487: 1483: 1460:(20): 5065–78. 1446: 1442: 1405: 1401: 1364: 1360: 1323: 1319: 1290:(12): 4119–29. 1280: 1276: 1245: 1234: 1227: 1213: 1209: 1202: 1188: 1184: 1147: 1143: 1104: 1100: 1085: 1059: 1055: 1015: 1011: 1002: 1000: 991: 990: 986: 979: 975: 970: 923: 883: 847: 791: 775: 762: 745: 492: 483: 458: 449:cumulus complex 444: 432: 421: 409: 404: 402:Characteristics 233:primary oocytes 229: 203: 134: 125: 124: 99: 90: 89: 78: 28: 23: 22: 15: 12: 11: 5: 3343: 3333: 3332: 3315: 3314: 3312: 3311: 3306: 3301: 3296: 3291: 3286: 3280: 3278: 3274: 3273: 3271: 3270: 3269: 3268: 3263: 3258: 3253: 3245: 3244: 3243: 3238: 3236:Vaginal artery 3233: 3231:Arcuate artery 3228: 3226:Uterine artery 3223: 3214: 3212: 3208: 3207: 3204: 3203: 3200: 3199: 3197: 3196: 3195: 3194: 3184: 3181: 3180: 3179: 3169: 3163: 3161: 3155: 3154: 3152: 3151: 3148: 3145: 3140: 3135: 3134: 3133: 3131:Pudendal nerve 3128: 3120: 3119: 3118: 3113: 3111:Veins of bulbs 3108: 3103: 3095: 3094: 3093: 3088: 3083: 3078: 3070: 3069: 3068: 3063: 3055: 3050: 3045: 3044: 3043: 3040: 3035: 3032: 3022: 3021: 3020: 3015: 3010: 3005: 2994: 2992: 2986: 2985: 2983: 2982: 2977: 2972: 2967: 2966: 2965: 2955: 2954: 2953: 2951:Perineal nerve 2948: 2943: 2938: 2933: 2928: 2923: 2918: 2916:Pudendal cleft 2908: 2902: 2900: 2891: 2882: 2876: 2875: 2872: 2871: 2869: 2868: 2863: 2858: 2857: 2856: 2851: 2846: 2835: 2833: 2827: 2826: 2824: 2823: 2821:Skene's glands 2818: 2812: 2810: 2806: 2805: 2802: 2801: 2799: 2798: 2793: 2787: 2785: 2781: 2780: 2778: 2777: 2772: 2767: 2762: 2757: 2751: 2749: 2743: 2742: 2740: 2739: 2734: 2729: 2728: 2727: 2722: 2717: 2706: 2704: 2698: 2697: 2695: 2694: 2689: 2688: 2687: 2682: 2677: 2672: 2662: 2657: 2656: 2655: 2650: 2639: 2637: 2630: 2624: 2623: 2620: 2619: 2617: 2616: 2611: 2610: 2609: 2599: 2593: 2591: 2585: 2584: 2582: 2581: 2580: 2579: 2569: 2563: 2561: 2555: 2554: 2552: 2551: 2546: 2541: 2536: 2531: 2526: 2520: 2518: 2512: 2511: 2508: 2507: 2505: 2504: 2499: 2494: 2489: 2484: 2481: 2475: 2473: 2467: 2466: 2464: 2463: 2458: 2453: 2452: 2451: 2446: 2436: 2431: 2425: 2423: 2419: 2418: 2416: 2415: 2410: 2405: 2403:Zona pellucida 2400: 2398:Corona radiata 2395: 2394: 2393: 2383: 2382: 2381: 2376: 2366: 2365: 2364: 2359: 2354: 2343: 2341: 2332: 2323: 2314: 2308: 2307: 2300: 2299: 2292: 2285: 2277: 2269: 2268: 2263: 2260: 2248: 2245: 2239: 2238: 2231: 2230:External links 2228: 2227: 2226: 2220: 2205: 2202: 2199: 2198: 2183: 2153: 2136: 2107:(6): 387–395. 2087: 2023: 1975: 1932: 1890: 1841: 1795: 1746: 1705: 1684:(3): 591–602. 1664: 1605: 1562: 1522: 1481: 1440: 1399: 1358: 1317: 1274: 1232: 1225: 1207: 1200: 1182: 1161:(10): 715–25. 1141: 1098: 1083: 1053: 1026:(4): 293–310. 1009: 984: 972: 971: 969: 966: 965: 964: 959: 954: 949: 944: 939: 934: 929: 922: 919: 918: 917: 910: 887:Nondisjunction 882: 879: 846: 843: 790: 787: 774: 771: 761: 758: 744: 741: 735:Xenopus laevis 724: 723: 720: 717: 714: 710: 709: 706: 703: 700: 696: 695: 694:BMP inhibitor 692: 689: 686: 682: 681: 678: 675: 672: 668: 667: 664: 661: 658: 654: 653: 652:FGF signaling 650: 647: 644: 640: 639: 636: 633: 630: 626: 625: 622: 619: 616: 612: 611: 608: 605: 602: 598: 597: 594: 591: 588: 584: 583: 580: 577: 574: 570: 569: 566: 563: 560: 556: 555: 552: 549: 546: 542: 541: 538: 535: 532: 528: 527: 524: 521: 518: 491: 488: 482: 479: 457: 454: 443: 440: 431: 428: 420: 417: 408: 405: 403: 400: 397: 396: 394: 391: 390:haploid/23(1N) 388: 382: 381: 378: 368: 365: 364:haploid/23(1N) 362: 356: 355: 352: 342: 339: 338:haploid/23(1N) 336: 330: 329: 323: 309: 306: 305:diploid/46(2N) 303: 301:primary Oocyte 297: 296: 293: 283: 280: 279:diploid/46(2N) 277: 271: 270: 267: 264: 259: 250: 225:Main article: 202: 199: 80: 79: 70: 64: 63: 58: 52: 51: 46: 40: 39: 35: 34: 26: 9: 6: 4: 3: 2: 3342: 3331: 3328: 3327: 3325: 3310: 3307: 3305: 3302: 3300: 3297: 3295: 3292: 3290: 3287: 3285: 3282: 3281: 3279: 3275: 3267: 3264: 3262: 3259: 3257: 3254: 3252: 3251:Ovarian veins 3249: 3248: 3246: 3242: 3239: 3237: 3234: 3232: 3229: 3227: 3224: 3222: 3219: 3218: 3216: 3215: 3213: 3209: 3193: 3190: 3189: 3188: 3185: 3182: 3178: 3175: 3174: 3173: 3170: 3168: 3165: 3164: 3162: 3160: 3156: 3149: 3146: 3144: 3141: 3139: 3138:Clitoral hood 3136: 3132: 3129: 3127: 3126:Dorsal nerves 3124: 3123: 3121: 3117: 3114: 3112: 3109: 3107: 3104: 3102: 3099: 3098: 3096: 3092: 3089: 3087: 3084: 3082: 3081:Deep arteries 3079: 3077: 3074: 3073: 3071: 3067: 3064: 3061: 3060: 3059: 3056: 3054: 3051: 3049: 3046: 3041: 3039: 3036: 3033: 3031: 3028: 3027: 3026: 3023: 3019: 3016: 3014: 3011: 3009: 3006: 3004: 3001: 3000: 2999: 2996: 2995: 2993: 2991: 2987: 2981: 2978: 2976: 2973: 2971: 2968: 2964: 2961: 2960: 2959: 2956: 2952: 2949: 2947: 2944: 2942: 2939: 2937: 2934: 2932: 2929: 2927: 2924: 2922: 2919: 2917: 2914: 2913: 2912: 2909: 2907: 2904: 2903: 2901: 2899: 2895: 2892: 2890: 2886: 2883: 2881: 2877: 2867: 2864: 2862: 2859: 2855: 2852: 2850: 2847: 2845: 2842: 2841: 2840: 2837: 2836: 2834: 2832: 2828: 2822: 2819: 2817: 2814: 2813: 2811: 2807: 2797: 2794: 2792: 2789: 2788: 2786: 2782: 2776: 2773: 2771: 2768: 2766: 2763: 2761: 2758: 2756: 2753: 2752: 2750: 2748: 2744: 2738: 2735: 2733: 2730: 2726: 2723: 2721: 2718: 2716: 2713: 2712: 2711: 2708: 2707: 2705: 2703: 2699: 2693: 2690: 2686: 2683: 2681: 2678: 2676: 2673: 2671: 2668: 2667: 2666: 2663: 2661: 2658: 2654: 2651: 2649: 2646: 2645: 2644: 2641: 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2123: 2118: 2114: 2110: 2106: 2102: 2098: 2091: 2083: 2079: 2074: 2069: 2064: 2059: 2055: 2051: 2047: 2043: 2039: 2032: 2030: 2028: 2019: 2015: 2011: 2007: 2003: 1999: 1996:(2): 275–87. 1995: 1991: 1984: 1982: 1980: 1971: 1967: 1963: 1959: 1955: 1951: 1947: 1943: 1936: 1928: 1924: 1919: 1914: 1910: 1906: 1902: 1894: 1886: 1882: 1877: 1872: 1868: 1864: 1860: 1856: 1852: 1845: 1837: 1833: 1829: 1825: 1821: 1817: 1813: 1809: 1802: 1800: 1791: 1787: 1782: 1777: 1773: 1769: 1766:(5): 350–63. 1765: 1761: 1757: 1750: 1742: 1738: 1733: 1728: 1725:(7): 1381–9. 1724: 1720: 1716: 1709: 1701: 1697: 1692: 1687: 1683: 1679: 1675: 1668: 1660: 1656: 1652: 1648: 1643: 1642:11577/2439217 1638: 1633: 1628: 1624: 1620: 1616: 1609: 1601: 1597: 1593: 1589: 1585: 1581: 1578:(3): 141–51. 1577: 1573: 1566: 1558: 1554: 1550: 1546: 1542: 1538: 1531: 1529: 1527: 1518: 1514: 1509: 1504: 1500: 1496: 1492: 1485: 1477: 1473: 1468: 1463: 1459: 1455: 1451: 1444: 1436: 1432: 1427: 1422: 1419:(2): 337–52. 1418: 1414: 1410: 1403: 1395: 1391: 1386: 1381: 1378:(2): 278–91. 1377: 1373: 1369: 1362: 1354: 1350: 1345: 1340: 1337:(2): 377–86. 1336: 1332: 1328: 1321: 1313: 1309: 1305: 1301: 1297: 1293: 1289: 1285: 1278: 1270: 1266: 1262: 1258: 1254: 1250: 1243: 1241: 1239: 1237: 1228: 1222: 1218: 1211: 1203: 1197: 1193: 1186: 1178: 1174: 1169: 1164: 1160: 1156: 1152: 1145: 1137: 1133: 1129: 1125: 1121: 1117: 1114:(3): 414–24. 1113: 1109: 1102: 1094: 1090: 1086: 1080: 1076: 1072: 1068: 1064: 1057: 1049: 1045: 1041: 1037: 1033: 1029: 1025: 1021: 1013: 998: 994: 988: 982: 977: 973: 963: 960: 958: 955: 953: 950: 948: 945: 943: 940: 938: 935: 933: 930: 928: 925: 924: 915: 911: 908: 904: 900: 899:Down syndrome 896: 892: 888: 885: 884: 881:Abnormalities 878: 877: 871: 868: 864: 860: 856: 852: 842: 840: 836: 832: 828: 824: 820: 816: 812: 808: 804: 800: 796: 786: 784: 780: 770: 767: 757: 754: 750: 737: 736: 730: 721: 718: 715: 712: 711: 707: 704: 701: 698: 697: 693: 690: 687: 684: 683: 679: 676: 673: 670: 669: 665: 662: 659: 656: 655: 651: 648: 645: 642: 641: 637: 634: 631: 628: 627: 623: 620: 617: 614: 613: 609: 606: 603: 600: 599: 595: 592: 589: 586: 585: 581: 578: 575: 572: 571: 567: 564: 561: 558: 557: 553: 550: 547: 544: 543: 539: 536: 533: 530: 529: 525: 523:Localization 522: 519: 516: 515: 512: 510: 506: 505:fertilization 501: 497: 487: 478: 476: 472: 471:gametogenesis 462: 453: 450: 439: 437: 427: 424: 416: 414: 395: 392: 389: 387: 384: 383: 379: 376: 372: 371:Ootidogenesis 369: 366: 363: 361: 358: 357: 353: 350: 346: 345:Ootidogenesis 343: 340: 337: 335: 332: 331: 327: 324: 321: 317: 313: 312:Ootidogenesis 310: 307: 304: 302: 299: 298: 294: 291: 287: 286:Oocytogenesis 284: 281: 278: 276: 273: 272: 268: 265: 263: 260: 258: 254: 251: 248: 247: 244: 242: 238: 234: 228: 220: 216: 212: 207: 198: 196: 192: 188: 184: 180: 176: 172: 171:immature ovum 168: 164: 160: 156: 152: 146: 128: 120: 93: 87: 75: 69: 65: 62: 59: 57: 53: 50: 47: 45: 41: 36: 31: 19: 3256:Uterine vein 3211:Blood supply 2958:Labia minora 2911:Labia majora 2486: 2461:Retia ovarii 2438: 2346: 2250: 2211: 2166: 2162: 2156: 2139: 2104: 2100: 2090: 2045: 2041: 1993: 1989: 1945: 1935: 1908: 1904: 1893: 1858: 1854: 1844: 1811: 1807: 1763: 1759: 1749: 1722: 1718: 1708: 1681: 1677: 1667: 1625:(1): 87–99. 1622: 1618: 1608: 1575: 1571: 1565: 1540: 1536: 1498: 1494: 1484: 1457: 1453: 1443: 1416: 1412: 1402: 1375: 1371: 1361: 1334: 1330: 1320: 1287: 1283: 1277: 1252: 1248: 1216: 1210: 1191: 1185: 1158: 1154: 1144: 1111: 1107: 1101: 1066: 1062: 1056: 1023: 1019: 1012: 1001:. Retrieved 999:. 2019-10-07 996: 987: 976: 872: 851:spermatozoon 848: 792: 776: 763: 753:microtubules 749:mitochondria 746: 743:Mitochondria 734: 493: 484: 467: 464:Oocyte poles 445: 433: 425: 422: 410: 333: 300: 236: 232: 230: 167:reproduction 165:involved in 157:is a female 154: 150: 85: 83: 2732:Parametrium 2725:Perimetrium 2715:Endometrium 2680:External os 2675:Internal os 2534:Infundibula 1855:Development 1719:Development 1678:Development 1543:(1): 93–8. 1495:Development 1454:Development 1284:Development 1226:976-8056169 981:answers.com 823:DNA damages 657:Ectodermin 621:Ubiquitous 607:Ubiquitous 593:Ubiquitous 579:Ubiquitous 257:chromosomes 211:chromosomes 38:Identifiers 3330:Germ cells 2906:Mons pubis 2866:Epithelium 2737:Epithelium 2720:Myometrium 2614:Paroophora 1255:: 223–90. 1069:: 251–91. 1003:2022-04-09 968:References 947:Polar body 895:aneuploidy 867:centrosome 855:pronucleus 705:Not known 691:Not known 649:Not known 638:Not known 565:Not known 262:chromatids 189:. During 185:, forming 159:gametocyte 3217:Arteries 3159:Vestibule 3072:Arteries 2747:Ligaments 2602:Epoophora 2559:Ligaments 2471:Oogenesis 2339:Follicles 2259:+ Oocyte 1970:264972543 891:chromatid 863:centriole 839:fertility 799:gestation 779:ribosomes 773:Ribosomes 766:nucleolus 760:Nucleolus 526:Function 436:cell-nest 413:cytoplasm 407:Cytoplasm 249:Cell type 241:ovulation 237:secondary 227:Oogenesis 201:Formation 191:oogenesis 163:germ cell 3324:Category 3066:Frenulum 2990:Clitoris 2963:Frenulum 2880:External 2854:Fornices 2539:Fimbriae 2529:Ampullae 2479:Oogonium 2362:Albicans 2312:Internal 2193:10603574 2169:: 1–65. 2131:29955025 2082:32381741 1962:37919411 1927:37922900 1885:18599511 1828:18239124 1790:17376659 1741:12588853 1700:15634697 1659:16628152 1651:15820681 1600:20281053 1557:16426874 1517:12874116 1476:15459100 1435:14499645 1394:12729558 1353:11784070 1312:28462527 1269:18703408 1177:20435609 1128:11835587 1093:15219785 1048:23482731 1040:17309079 921:See also 815:germline 803:dictyate 702:Protein 688:Protein 660:Protein 635:Nucleus 632:Protein 615:Lef/Tcf 604:Protein 576:Protein 500:proteins 326:Dictyate 275:Oogonium 175:egg cell 3187:Urethra 3122:Nerves 2784:General 2660:Isthmus 2636:Regions 2456:Medulla 2379:Interna 2374:Externa 2330:Ovaries 2204:Sources 2122:6085769 2073:7260990 2050:Bibcode 2018:9778439 1998:Bibcode 1876:2708103 1836:7799743 1808:Science 1781:2435194 1592:7893598 1304:9012531 1136:5728551 833:and by 813:of the 795:meiosis 559:XXBP-1 419:Nucleus 375:meiosis 349:meiosis 316:meiosis 290:mitosis 266:Process 219:meiosis 187:oogonia 183:mitosis 155:ovocyte 49:D009865 3284:G-spot 3247:Veins 3150:Septum 3143:Fascia 3097:Veins 3062:Corona 2831:Vagina 2791:Glands 2702:Layers 2665:Cervix 2653:Fundus 2648:Cavity 2628:Uterus 2524:Isthmi 2487:Oocyte 2449:Stroma 2439:Cortex 2369:Thecae 2357:Luteum 2347:Corpus 2321:Adnexa 2265:Zygote 2218:  2191:  2181:  2129:  2119:  2080:  2070:  2016:  1968:  1960:  1946:Nature 1925:  1883:  1873:  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1588:PMID 1553:PMID 1513:PMID 1472:PMID 1431:PMID 1390:PMID 1349:PMID 1300:PMID 1265:PMID 1221:ISBN 1196:ISBN 1173:PMID 1124:PMID 1089:PMID 1079:ISBN 1036:PMID 901:and 849:The 601:p53 545:Vg1 430:Nest 386:Ovum 318:I) ( 215:ovum 44:MeSH 2171:doi 2167:195 2145:doi 2117:PMC 2109:doi 2068:PMC 2058:doi 2046:117 2006:doi 1994:194 1950:doi 1913:doi 1909:186 1871:PMC 1863:doi 1859:135 1816:doi 1812:319 1776:PMC 1768:doi 1764:124 1727:doi 1723:130 1686:doi 1682:132 1637:hdl 1627:doi 1623:121 1580:doi 1545:doi 1503:doi 1499:130 1462:doi 1458:131 1421:doi 1417:261 1380:doi 1376:257 1339:doi 1335:240 1292:doi 1288:122 1257:doi 1253:268 1163:doi 1116:doi 1071:doi 1067:235 1028:doi 1024:268 874:of 377:II) 351:II) 161:or 149:), 84:An 56:FMA 3326:: 2187:. 2177:. 2165:. 2125:. 2115:. 2105:39 2103:. 2099:. 2076:. 2066:. 2056:. 2044:. 2040:. 2026:^ 2012:. 2004:. 1992:. 1978:^ 1964:. 1956:. 1948:. 1944:. 1921:. 1907:. 1903:. 1879:. 1869:. 1857:. 1853:. 1830:. 1822:. 1810:. 1798:^ 1784:. 1774:. 1762:. 1758:. 1735:. 1721:. 1717:. 1694:. 1680:. 1676:. 1653:. 1645:. 1635:. 1621:. 1617:. 1594:. 1586:. 1576:48 1574:. 1551:. 1541:17 1539:. 1525:^ 1511:. 1497:. 1493:. 1470:. 1456:. 1452:. 1429:. 1415:. 1411:. 1388:. 1374:. 1370:. 1347:. 1333:. 1329:. 1306:. 1298:. 1286:. 1263:. 1251:. 1235:^ 1171:. 1159:16 1157:. 1153:. 1130:. 1122:. 1112:61 1110:. 1087:. 1077:. 1065:. 1042:. 1034:. 1022:. 995:. 841:. 511:. 477:. 438:. 393:1C 367:1C 341:2C 308:4C 282:2C 243:. 197:. 145:-/ 142:oʊ 139:oʊ 129:: 127:US 123:, 113:aɪ 104:oʊ 94:: 92:UK 2296:e 2289:t 2282:v 2224:. 2195:. 2173:: 2147:: 2133:. 2111:: 2084:. 2060:: 2052:: 2020:. 2008:: 2000:: 1972:. 1952:: 1929:. 1915:: 1887:. 1865:: 1838:. 1818:: 1792:. 1770:: 1743:. 1729:: 1702:. 1688:: 1661:. 1639:: 1629:: 1602:. 1582:: 1559:. 1547:: 1519:. 1505:: 1478:. 1464:: 1437:. 1423:: 1396:. 1382:: 1355:. 1341:: 1314:. 1294:: 1271:. 1259:: 1229:. 1204:. 1179:. 1165:: 1138:. 1118:: 1095:. 1073:: 1050:. 1030:: 1006:. 909:. 373:( 347:( 322:) 314:( 292:) 288:( 255:/ 221:. 136:ˈ 133:/ 119:/ 116:t 110:s 107:ə 101:ˈ 98:/ 88:( 76:] 20:)

Index

Secondary oocyte
MeSH
D009865
FMA
18644
Anatomical terminology
edit on Wikidata
UK
/ˈəst/
US
/ˈ-/
gametocyte
germ cell
reproduction
immature ovum
egg cell
female gametogenesis
mitosis
oogonia
oogenesis
cryoconservation

chromosomes
ovum
meiosis
Oogenesis
ovulation
ploidy
chromosomes
chromatids

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