Lesson eLearning

Describe how progesterone produced by the corpus luteum modifies the endometrial lining to prepare it for possible implantation.

medium 4 marks Class 12 · Biology · Human Reproduction
Answer
Progesterone stimulates stromal cell proliferation, increases glandular secretion, and reduces estrogen‑dependent epithelial proliferation, thereby making the endometrium receptive.

Step-by-step solution

  1. Explain that progesterone is secreted by the corpus luteum after ovulation.
  2. Show that it acts on stromal cells to increase their proliferation and secretory activity.
  3. State that it promotes secretion of glycogen and proteins from endometrial glands.
  4. Mention that progesterone down‑regulates estrogen‑mediated epithelial proliferation, stabilising the epithelium.
Common mistake: Saying progesterone only thickens endometrium without mentioning cellular changes.

Concept tested: Progesterone action in endometrium

Published · How this solution was prepared and checked

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