Question

The role of the corpus luteum and the hormones it produces ends:
A) At the time of embryonic implantation in the uterus.
B) With the formation of the placenta.
C) During the second trimester of pregnancy.
D) Just prior to parturition.

Answer 1

Hint: The hormones produced by the corpus luteum are crucial for maintaining early pregnancy. However, the placenta fully develops and takes over hormone synthesis during the second trimester, which causes corpus luteum atrophy.

Complete Step by Step Answer:
Making your uterus a healthy environment for a foetus to grow is the corpus luteum's responsibility. It causes the production of the progesterone hormone, which gets your uterus ready for conception. Your corpus luteum disappears once it is no longer required for the production of progesterone.
Progesterone is the main hormone secreted by the corpus luteum, however it also makes inhibin A and estradiol. The corpus luteum will age more slowly without fertilisation.
Progesterone, a steroid hormone important for the decidualization of the endometrium (its development) and maintenance, is secreted by the corpus luteum. Additionally, relaxin, a hormone that softens the pubic symphysis and aids in parturition, is produced by this process.

Hence, option C is the correct answer.

Note: Estrogen and progesterone continue to rise during the second trimester to aid in the development of the foetus. However, these hormones also activate the hormone that stimulates melanocytes. It causes the melanocyte cells on your skin to begin producing melanin, which gives your skin colour.
Human chorionic gonadotropin (hCG) hormone levels have decreased, and the levels of the hormones oestrogen and progesterone have been adjusted.