In uterus, the endometrium proliferates in response to:

• a. Relaxin
• b. Oxytocin
• c. Progesterone
• d. Oestrogen
• e. Luteinizing hormone

The endometrium, which is the inner lining of the uterus, undergoes a process of proliferation in response to specific hormones. Among the options provided, the correct answer is:

Key Hormone for Endometrial Proliferation

Oestrogen plays a crucial role in stimulating the growth and thickening of the endometrium during the menstrual cycle, particularly in the follicular phase.

Other Hormones Explained

• Relaxin: Primarily involved in pregnancy and childbirth, it helps relax the uterus and pelvic ligaments.
• Oxytocin: Known for its role in labor and milk ejection, it does not directly cause endometrial proliferation.
• Progesterone: While it prepares the endometrium for potential implantation, it does not stimulate proliferation.
• Luteinizing Hormone: Important for ovulation, but not directly responsible for endometrial growth.

In summary, oestrogen is the primary hormone that promotes the proliferation of the endometrium in the uterus.