An embryo with a genital tubercle, urethral folds, and urethral groove must be
A) under seven weeks old.
B) seven weeks old.
C) nine weeks old.
D) Unable to determine the age.

Question

Quizplus · Accepted Answer

The presence of a genital tubercle, urethral folds, and urethral groove indicates that the embryo is in the early stages of genital development. This typically occurs between weeks 4-7 of fetal development, making option A the most likely choice. Option B is possible but less likely since by 7 weeks, the genital structures have begun to differentiate further. Option C is incorrect as by 9 weeks, the external genitalia have usually fully formed. Option D is incorrect as the information given is sufficient to make an approximation of the embryo's age.

An Embryo with a Genital Tubercle, Urethral Folds, and Urethral