The corpus luteum will

a. degenerate into a corpus albicans if fertilization does not occur.

b. remain active if fertilization occurs.

c. produce luteinizing hormone to stimulate the uterus to enter the secretory phase.

d. A&B

e. A, B, & C

Option (D).

Explanation:

Corpus luteum is a cluster of cell mass present in the ovary. Corpus luteum release hormones and play an important role in the female reproductive system.

Corpus luteum is degenerated into the corpus albicans if the egg is not fertilized by the sperm. During early pregnancy, corpus luteum releases the hormone progesterone. After 10 weeks of pregnancy corpus luteum starts decreasing in size.

Thus, the correct answer is option (D).