Why is menstrual cycle important among females A. To know if she is healthy

B. To know that she is a female

C. It makes a girl become younger

D. It serves as a preparatory phase for possible pregnancy

D . It serves as a preparatory phase for a possible pregnancy

Explanation: the ovaries release an egg and the menstrual cycle occurs because its preparing for a pregnancy in case the egg gets fertilized.

answer; /// an alphabetical list of sources arranged according to a citation style and followed by a summary of the content;