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R\u00e1tky J, Brussow KP, Egerszegi I, Torner H, Schneider F, Solti L, Manabe N. Comparison of follicular and oocyte development and reproductive hormone secretion during the ovulatory period in Hungarian native breed, Mangalica, and Landrace gilts. <i>J Reprod Dev<\/i> 2005; 51: 427\u2013432.","DOI":"10.1262\/jrd.17016"},{"key":"2","unstructured":"2. Wise ME. Pubertal development of the gilt: characterization of gonadotropic and gonadal hormones and the negative and positive regulation of LH and FSH. PhD dissertation, University of Nebraska-Lincoln, 1982."},{"key":"3","doi-asserted-by":"crossref","unstructured":"3. Dufour JJ, Grasso F, Daviault E, Matton P. Relationship between two morphological types of ovaries and their follicular microscopic population before puberty and their ensuing follicular development and ovulation rates at puberty in gilts. <i>J Anim Sci<\/i> 1988; 66: 932\u2013938.","DOI":"10.2527\/jas1988.664932x"},{"key":"4","doi-asserted-by":"crossref","unstructured":"4. Bolamba D, Matton P, Estrada R, Dufour JJ. Ovarian follicular dynamics and relationship between ovarian types and serum concentrations of sex steroids and gonadotrophin in prepubertal gilts. <i>Anim Reprod Sci<\/i> 1994; 36: 291\u2013304.","DOI":"10.1016\/0378-4320(94)90075-2"},{"key":"5","doi-asserted-by":"crossref","unstructured":"5. Evans ACO. Characteristics of ovarian follicle development in domestic animals. <i>Reprod Domest Anim<\/i> 2003; 38: 240\u2013246.","DOI":"10.1046\/j.1439-0531.2003.00439.x"},{"key":"6","unstructured":"6. K\u00e4hn W. Veterinary Reproductive Ultrasonography (English translation and revisions: D Volkman and RM Kenney). 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Antral follicle growth and endocrine changes in prepubertal cattle, sheep and goats. <i>Anim Reprod Sci<\/i> 2003; 78: 259\u2013270.","DOI":"10.1016\/S0378-4320(03)00094-0"},{"key":"10","doi-asserted-by":"crossref","unstructured":"10. Ginther OJ, Kot K, Wiltbank MC. Associations between emergence of follicular waves and fluctuations in FSH concentrations during the estrous cycle in ewes. <i>Theriogenology<\/i> 1995; 43: 689\u2013703.","DOI":"10.1016\/0093-691X(94)00074-5"},{"key":"11","doi-asserted-by":"crossref","unstructured":"11. Ginther OJ, Kot K. Follicular dynamics during the ovulatory season in goats. <i>Theriogenology<\/i> 1994; 42: 987\u20131001.","DOI":"10.1016\/0093-691X(94)90121-X"},{"key":"12","doi-asserted-by":"crossref","unstructured":"12. Duggavathi R, Bartlewski PM, Barrett DMW, Rawlings NC. Use of high-resolution transrectal ultrasonography to assess changes in numbers of small ovarian antral follicles and their relationships to the emergence of follicular waves in cyclic ewes. <i>Theriogenology<\/i> 2003; 60: 495\u2013510.","DOI":"10.1016\/S0093-691X(03)00041-4"},{"key":"13","unstructured":"13. Schwarz T, Wierzcho\u015b E. Growth of the ovary follicles in the oestrus cycle in goats. <i>Medycyna Weterynaryjna<\/i> 2000; 56: 194\u2013197."},{"key":"14","doi-asserted-by":"crossref","unstructured":"14. Bartlewski PM, Beard AP, Cook SJ, Chandolia RK, Honaramooz A, Rawlings NC. Ovarian antral follicular dynamics and their relationships with endocrine variables throughout the oestrous cycle in breeds of sheep differing in prolificacy. <i>J Reprod Fertil <\/i> 1999; 115: 111\u2013124.","DOI":"10.1530\/jrf.0.1150111"},{"key":"15","unstructured":"15. Adams GP. Comparative patterns of follicle development and selection in ruminants. <i>J Reprod Fertil Suppl<\/i> 1999; 54: 17\u201332."},{"key":"16","doi-asserted-by":"crossref","unstructured":"16. Bartlewski PM, Beard AP, Rawlings NC. Reproductive cycles in sheep. <i>Anim Reprod Sci<\/i> 2011; 124: 259\u2013268.","DOI":"10.1016\/j.anireprosci.2011.02.024"},{"key":"17","doi-asserted-by":"crossref","unstructured":"17. Guthrie HD, Bolt DJ, Cooper BS. Effects of gonadotropin treatment on ovarian follicle growth and granulosal cell aromatase activity in prepubertal gilts. <i>J Anim Sci<\/i> 1990; 68: 3719\u20133726.","DOI":"10.2527\/1990.68113719x"},{"key":"18","doi-asserted-by":"crossref","unstructured":"18. Guthrie HD. The follicular phase in pigs: Follicle populations, circulating hormones, follicle factors and oocytes. <i>J Anim Sci<\/i>2005; 83(E Suppl): E79\u2013E89.","DOI":"10.2527\/2005.8313_supplE79x"},{"key":"19","doi-asserted-by":"crossref","unstructured":"19. Br\u00fcssow KP, Schneider A, Tuchscherer A, R\u00e1tky J, Kraeling RR, Kanitz W. Luteinizing hormone release after administration of the gonadtropin-releasing hormone agonist Fertilan (goserelin) for synchronization of ovulation in pigs. <i>J Anim Sci<\/i> 2007; 85: 129\u2013137.","DOI":"10.2527\/jas.2006-281"},{"key":"20","doi-asserted-by":"crossref","unstructured":"20. Holtz W, Schlieper B. Unsatisfactory results with the transfer of embryos from gilts superovulated with PMSG and hCG. <i>Theriogenology<\/i> 1991; 35: 1237\u20131249.","DOI":"10.1016\/0093-691X(91)90369-O"},{"key":"21","doi-asserted-by":"crossref","unstructured":"21. Redmer DA, Christenson RK, Ford JJ, Day BN. Effect of unilateral ovariectomy on compensatory ovarian hypertrophy, peripheral concentrations of follicle-stimulating hormone and luteinizing hormone, and ovarian venous concentrations of estradiol-17 beta in prepuberal gilts. <i>Biol Reprod<\/i> 1984; 31: 59\u201366.","DOI":"10.1095\/biolreprod31.1.59"},{"key":"22","doi-asserted-by":"crossref","unstructured":"22. Prunier A, Chopineau M, Mounier AM, Mormede P. Patterns of plasma LH, FSH, oestradiol and corticosteroids from birth to the first oestrous cycle in Meishan gilts. <i>J Reprod Fertil<\/i> 1993; 98: 313\u2013319.","DOI":"10.1530\/jrf.0.0980313"},{"key":"23","doi-asserted-by":"crossref","unstructured":"23. Camous S, Prunier A, Pelletier J. Plasma prolactin LH, FSH, and estrogen secretion patterns in gilts during sexual development. <i>J Anim Sci<\/i> 1985; 60: 1308\u20131317.","DOI":"10.2527\/jas1985.6051308x"},{"key":"24","doi-asserted-by":"crossref","unstructured":"24. Soede NM, Langendijk P, Kemp B. 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Bartlewski PM, Beard AP, Rawlings NC. Ultrasonographic study of ovarian function during early pregnancy and after parturition in the ewe. <i>Theriogenology<\/i> 2000; 53: 673\u2013689.","DOI":"10.1016\/S0093-691X(99)00266-6"},{"key":"29","doi-asserted-by":"crossref","unstructured":"29. Schwarz T, Wierzcho\u015b E. The distribution of corpora lutea and ovarian follicular development in pregnant goats. <i>Reprod Biol<\/i> 2010; 10: 53\u201366.","DOI":"10.1016\/S1642-431X(12)60037-0"},{"key":"30","doi-asserted-by":"crossref","unstructured":"30. Jaiswal RS, Singh J, Adams GP. 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