The Question is from neet-zoology , and it was created by the author BALASOURY

Question

Which of the following combinations correctly matches the hormone with its primary role during pregnancy?

BALASOURY · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Endocrine roles during pregnancy
 **Related Topics**: Hormones, pregnancy physiology, corpus luteum, placental hormones
 **Prerequisites**: Basic understanding of hormone functions and the stages of pregnancy.
## SOLUTION PATHWAY
**Given Information**:
  Four options matching hormones with their roles during pregnancy.
  Correct option to be identified.
**Method & Steps**:
 1. Analyze each option individually to determine the accuracy of the hormone-function pairing.
  Reasoning: Each hormone plays a specific role in maintaining pregnancy.  Incorrect pairings will be identified by factual inaccuracies.
  Formula/Rule: N/A
 2. Evaluate option A: hPL initiates uterine contractions.  While hPL contributes to preparing the breasts for lactation and influencing maternal metabolism, its primary role isn't uterine contraction initiation (that's primarily oxytocin). Therefore, option A is incorrect.
  Working: hPL's primary role is metabolic regulation during pregnancy. Uterine contractions are initiated by oxytocin.
  Key Point:  Knowing the primary function of each hormone is crucial.
 3. Evaluate option B: Progesterone stimulates milk production. Progesterone primarily maintains the uterine lining and prevents premature contractions.  Milk production is stimulated by prolactin post-partum.
  Working: Progesterone is essential for pregnancy maintenance but not for milk production.
  Key Point: Differentiate between pregnancy maintenance and lactation.
 4. Evaluate option C: hCG maintains the corpus luteum. This is correct.  hCG, produced by the developing embryo, signals the corpus luteum to continue producing progesterone, essential for early pregnancy maintenance.
  Working: hCG's crucial role is to support the corpus luteum until the placenta takes over progesterone production.
  Key Point: hCG is a key indicator of pregnancy.
 5. Evaluate option D: Estrogen prevents immune rejection of the fetus.  While estrogen plays a role in pregnancy, preventing immune rejection is primarily attributed to other mechanisms involving immune tolerance.
  Working: Estrogen has multiple roles in pregnancy, but not primarily immune rejection prevention.
  Key Point: Immune tolerance during pregnancy is a complex process involving multiple factors.
 6. Final Step: Option C is the only correct combination.
  Result: C
  Verification:  Confirm that the function of hCG aligns with its established role in maintaining the corpus luteum during early pregnancy.
 ## OPTION ANALYSIS
A :x: Incorrect. hPL's primary role is not initiating uterine contractions.
B :x: Incorrect. Progesterone's primary role is not stimulating milk production.
C ✓: Correct. hCG maintains the corpus luteum during early pregnancy.
D :x: Incorrect.  Estrogen does not primarily prevent immune rejection of the fetus.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the roles of different hormones involved in pregnancy: Careful study of each hormone's function is essential.
  2.Overlooking the timing of hormone actions:  Hormone roles can change throughout pregnancy.
 **Quick Tips**:
  1.Create a table summarizing the key hormones and their primary functions during pregnancy.
  2.Use mnemonics to remember the roles of different hormones.

BALASOURY · Answer

Human Placental Lactogen (hPL) - Initiates uterine contractions

BALASOURY · Answer

Progesterone - Stimulates milk production

BALASOURY · Answer

The correct Option is "Human Chorionic Gonadotropin (hCG) - Maintains corpus luteum"

BALASOURY · Answer

Estrogen - Prevents immune rejection of the fetus

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