Read the graph and correlate the uterine events that take place according to the hormonal levels on A. 6-15 days, B. 16-25 days, C. 26-28 days (if the ovum is not fertilised).
(A)A-Degeneration of endometrium; B-Myometrium thickens, becomes vascularised, ready to receive and implant an embryo; C-Regeneration of endometrium
(B)A-Degeneration of endometrium; B-Endometrium thickens, becomes vascularised, ready to receive and implant an embryo; C-Regeneration of endometrium
(C)A-Endometrium thickens, becomes vascularised, ready to receive and implant an embryo; B-Degeneration of endometrium; C-Regeneration of endometrium
(D)A-Regeneration of endometrium; B-Endometrium thickens, becomes vascularised, ready to receive and implant an embryo; C-Degeneration of endometriumCorrect
Answer: (D)
Solution
From day 6-15 the endometrium regenerates (proliferative phase) after menstruation, from day 16-25 it thickens and becomes vascularised in readiness for a possible embryo (secretory phase), and from
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