The period of the embryo begins at _____ and ends with _____, which takes about _____.
A)conception; birth; nine months
B)the first trimester; implantation into the uterine wall; twelve weeks
C)week 3; formation of bone cells; six weeks
D)organogenesis; ossification; one trimester

Question

Quizplus · Accepted Answer

The period of the embryo begins at week 3 and ends with the formation of bone cells at around six weeks.

The Period of the Embryo Begins at _____ and Ends