Embryonic Genital Development
Country: United States
Date: July 2005
Hello, I am 13 weeks pregnant is it true that a
female and male sex organs look exactly alike at this stage?
By this time, you should be able to tell what sex your child is, if you
were able to peer inside that is! Usually, outward sex begins to develop at
6 weeks. Of course, your child is determined to be a boy or girl at
It depends on what you mean by look alike. At 9 weeks, if you dissect an
embryo, you can tell whether it was going to develop a uterus or testes.
Ron Baker, Ph.D.
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Update: June 2012