Hormone which plays the most important role in preparing the uterus for pregnancy ?
A. Prolactin
B. Progesterone
C. hCG
D. Follicle stimulating hormone
Correct Answer: B. Progesterone
Explanation:-
• Progesterone is the hormone that plays the most important role in preparing the uterus for pregnancy.
How progesterone prepares the uterus:
• Maintains and thickens the endometrial lining
• Increases blood supply and nutrient content of the uterus to support implantation
• Decreases uterine muscle contractions to prevent expulsion of the fertilized egg
• Supports early pregnancy until the placenta forms
So, the correct answer is:
👉 Progesterone
Other Options Details
Here is the description of all the options:
A. Prolactin
• A hormone secreted by the anterior pituitary gland.
• Main role is to stimulate milk production (lactation) after childbirth.
• Helps maintain lactation along with oxytocin.
• Levels increase during pregnancy and breastfeeding.
B. Progesterone
• A hormone mainly secreted by the corpus luteum in the ovary and later by the placenta during pregnancy.
• Prepares the endometrium (uterine lining) for implantation.
• Maintains pregnancy and prevents uterine contractions.
• Responsible for the rise in basal body temperature after ovulation.
C. hCG (Human Chorionic Gonadotropin)
• A hormone produced by the placenta after implantation.
• Maintains the corpus luteum in early pregnancy so it continues to produce progesterone.
• Basis for pregnancy tests, because its level rises in blood and urine after conception.
D. Follicle Stimulating Hormone (FSH)
• A hormone released by the anterior pituitary gland.
• In females, stimulates the growth and development of ovarian follicles.
• Works with LH in regulating the menstrual cycle.
• In males, stimulates spermatogenesis in the testes.
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Writer: Vandita Singh, Lucknow (GS India Nursing Group)