The initial reproductive structures of the male and female embryos appear the same until which week of gestation?a. Third c. Twentiethb. Eighth d. Thirtieth
B. Between 6 and 7 weeks’ gestation, the male embryo differentiates under the influence of testes-determining factor (TDF). In the absence of testosterone, a loss of the wolffian system occurs and the two gonads develop into ovaries at 6 to 8 weeks’ gestation.
The initial reproductive structures of the male and female embryos appear to be the same until the eighth week of gestation. At this stage, the differentiation of the gonads begins, and the male and female reproductive structures start to differentiate into their respective forms. By the end of the eighth week, the male fetuses will have the beginnings of testes, and female fetuses will have the beginnings of ovaries.
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