Before the placenta functions, the corpus luteum is the primary source for synthesis of which of the following hormones
A. Thyroxine
B. FSH
C. Estrogen and progesterone
D. T4 and TSH
Correct Answer: C. Estrogen and progesterone
Explanation
Answer: Progesterone
Before the placenta takes over hormone production (around 10–12 weeks of pregnancy), the corpus luteum is the primary source for the synthesis of progesterone.
Why Progesterone?
- Progesterone is essential for maintaining early pregnancy.
- It helps prepare and maintain the endometrium for implantation.
- It prevents uterine contractions that could expel the embryo.
- It supports early development until the placenta becomes functional.
Additional Information
The corpus luteum also produces small amounts of estrogen, but the main hormone responsible for maintaining early pregnancy is progesterone.
Correct Option: Progesterone
Other Options Details
Here is the description of all the options listed:
A. Thyroxine
- Thyroxine (also called T4) is a hormone produced by the thyroid gland.
- It plays a major role in regulating metabolism, growth, development, and body temperature.
- It helps control the rate at which the body uses energy.
B. FSH
- FSH (Follicle Stimulating Hormone) is a hormone released by the anterior pituitary gland.
- In females, it stimulates the growth and maturation of ovarian follicles in the ovary.
- In males, it helps in spermatogenesis by acting on the Sertoli cells of the testes.
C. Estrogen and Progesterone
- These are the two major female reproductive hormones produced mainly by the ovaries.
- Estrogen: Responsible for development of secondary sexual characteristics, regulation of the menstrual cycle, and growth of the endometrium.
- Progesterone: Prepares and maintains the uterus for pregnancy, supports early pregnancy, and inhibits uterine contractions.
D. T4 and TSH
- T4 (Thyroxine) is a thyroid hormone produced by the thyroid gland.
- TSH (Thyroid Stimulating Hormone) is produced by the anterior pituitary gland and stimulates the thyroid gland to release T3 and T4.
- Together, they maintain feedback control of thyroid hormone levels in the body.
I hope that you liked this article.
Thanks!! 🙏 😊
Writer: Vandita Singh, Lucknow (GS India Nursing Group)