About ____ weeks after conception, an embryo's ovaries or testes have formed although the embryo's sex is not apparent by ultrasound.
A) two
B) four
C) six
D) eight

Name: About ____ weeks after conception, an embryo's ovaries or testes have formed although the embryo's sex is not apparent by ultrasound. A) two B) four C) six D) eight
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Question

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At around four weeks after conception, the gonads (ovaries or testes) of the embryo have formed, but the sex of the embryo is not yet apparent by ultrasound.

About ____ Weeks After Conception, an Embryo's Ovaries or Testes