What is the role of progesterone during pregnancy?

Correct Answer: B

Rationale: Progesterone during pregnancy maintains the uterine lining by supporting the implantation and growth of the embryo. This hormone helps prevent the shedding of the uterine lining which is crucial for a successful pregnancy. Progesterone does not stimulate uterine contractions (choice A), inhibit ovulation (choice C), or stimulate milk production (choice D) during pregnancy.

Correct Answer: A

Rationale: The correct answer is A: Maturation and storage of sperm. The epididymis is a coiled tube where sperm mature and are stored before ejaculation. Sperm are produced in the testes, not the epididymis, so choice B is incorrect. Seminal fluid is produced by the seminal vesicles and prostate gland, not the epididymis, making choice C incorrect. Lastly, the vas deferens is responsible for transporting sperm to the urethra, not the epididymis, so choice D is incorrect.

Correct Answer: A

Rationale: The mucous plug in the cervix during pregnancy serves to prevent infection by acting as a physical barrier, blocking the entry of harmful pathogens into the uterus and protecting the developing fetus. It does not facilitate sperm transport, as sperm travel through the cervical canal before pregnancy. It also does not enhance uterine contractions or nourish the embryo, as those functions are carried out by other mechanisms in the body during pregnancy.

Correct Answer: D

Rationale: Correct Answer: D - Progesterone Rationale: 1. Progesterone maintains the uterine lining for implantation and supports fetal development. 2. It inhibits contractions to prevent premature labor. 3. Estrogen helps with fetal development but is not the primary hormone during pregnancy. 4. Prolactin is responsible for milk production after birth, not fetal development. 5. hCG is produced early in pregnancy but does not directly support fetal development.

Correct Answer: A

Rationale: Estrogen is the correct answer as it is the primary hormone responsible for the development of female reproductive organs like the ovaries, uterus, and breasts. Estrogen plays a crucial role in regulating the menstrual cycle and supporting pregnancy. Testosterone is a male sex hormone. Progesterone is important for maintaining pregnancy and regulating the menstrual cycle. FSH (Follicle-stimulating hormone) stimulates the growth of ovarian follicles but is not directly involved in the development of female reproductive organs.