An important developmental event at 9 weeks gestational age is that the ______.
a. testes of a male embryo begin to produce androgens and that alters the development of the genitalia into a male reproductive system
b. ovaries of a female embryo begin to produce estrogen and that alters the development of the genitalia into a female reproductive system
c. conception implants in the lining of the uterus and establishes a connection with the maternal system
d. placenta begins to function and now brings nutrients and oxygen to the developing embryo
Ans: A
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