Secretion of testosterone from the fetal testes into fetal circulation begins around week 10 and peaks in the middle of the second trimester at week 16, reaching concentrations similar to a post-pubertal male. Endo- crine crosstalk between fetal testes and the placenta is an essential part of ...
progestin,progestogen- any of a group of steroid hormones that have the effect of progesterone androgen,androgenic hormone- male sex hormone that is produced in the testes and responsible for typical male sexual characteristics estrogen,oestrogen- a general term for female steroid sex hormones that ...
which triggers a developmental cascade that converts the nondifferentiated fetal gonad to testis, leading to the production of androgens such as testosterone from Leydig cells
which triggers a developmental cascade that converts the nondifferentiated fetal gonad to testis, leading to the production of androgens such as testosterone from Leydig cells
But what is the effect of brief, intra-uterine testosterone? Do people who were exposed to higher testosterone in the womb become/behave different/ly? An example: fraternal twins. Does the girl's stewing in the boy's testosterone make her a better athlete, President or serial killer?
Now it seems that sharing the womb also has a harmful effect on the sexual reproduction of women with a twin brother. Virpi Lummaa of the University of Sheffield, in Britain, and her colleagues made the claim after studying detailed data from several generations of church records from many ...
of older brothers. Breedlove was operating from some intriguing hypotheses. On average, among men, the ring finger is significantly longer than the index finger, especially on the right hand, an apparent effect of the release of testosterone, a "masculine" hormone, in the womb. In women, the...
and health all fluctuate as hormone levels change. Yet the impact is nuanced and often counterintuitive. Testosterone revs aggression in status-hungry men, but has little effect in more laid-back souls. Estrogen has long been thought to keepmemorysharp before menopause—but for women who start ta...
In the male reproductive system sperm are produced in the seminiferous tubules of the testes, two organs contained in the scrotum, an external sac in the groin. The testes also produce the male hormone testosterone and a portion of the seminal fluid, the liquid in which sperm are carried. ...
七个世界一个星球第1季第1集台词 英文中文200 million years ago,两亿年前our planet looked very different我们地球的样貌同...