抛射物
发表于 2025-3-25 06:11:12
Fiber Optics Standard Dictionaryc differentiation, whereas the supporting cells differentiate into Sertoli cells. Leydig cells are present at birth due to the effect of circulating maternal gonadotropins, and disappear a few weeks after birth. Thus, in a prepubertal testis, the interstitium contains no Leydig cells (Girgis and Hafez 1977).
aggressor
发表于 2025-3-25 10:44:58
https://doi.org/10.1007/978-1-4757-1177-6d to the haploid number of chromosomes takes place during ., in which spermatocytes undergo two maturation divisions and spermatids result. Cellular differentiation is referred to as .; during this phase a number of developmental events occur which lead to the formation of mature spermatozoa.
outrage
发表于 2025-3-25 15:28:22
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GET
发表于 2025-3-25 16:41:42
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承认
发表于 2025-3-25 23:11:01
Fiber Optics Standard Dictionarythe masculinizing hormone secreted by the testis whilst estrogenic principles were believed to be confined to the ovaries. As is so often the case in research, the theory of one hormone-one sex was being challenged even during its development.
Cabg318
发表于 2025-3-26 02:52:24
Biogenesis of Androgens and Estrogens by the Normal Testisthe masculinizing hormone secreted by the testis whilst estrogenic principles were believed to be confined to the ovaries. As is so often the case in research, the theory of one hormone-one sex was being challenged even during its development.
Proclaim
发表于 2025-3-26 08:02:48
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悄悄移动
发表于 2025-3-26 10:00:51
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牙齿
发表于 2025-3-26 14:28:42
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山间窄路
发表于 2025-3-26 20:50:03
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