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Q.
Read the graph and correlate the uterine events that take place according to the hormonal levels on
(I) $6-15$ days
(II) $16-25 $ days ,br>
(III) $26-28$ days (if the ovum is not fertilized).
Human Reproduction
Solution:
Correct answer is (d) $I$ - Regeneration of endometrium, $II$ - Endometrium thickens, becomes vascularised, ready to receive and implant embryo, $III$ - Degeneration of endometrium.