Typically, experiments are divided into and groups. *

Typically,experiments are divided in to control group and experimental group

Explanation:

well, you see. the answer to your question is quite simple. the thing that is big, powerful, and over 9,000 is your mom.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )