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Human Reproduction
Menstrual Cycle and Implantation
1 question from 1 paper, each with its answer.
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- years asked, 2017–2026
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- of Human Reproduction
- 0.86%
Concepts tested
- endometrium and implantation
All Questions
2023 1 question
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Endometrium is necessary for implantation of blastocyst.Reason: In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium.
Both are true, but the corpus luteum degeneration does not explain why the endometrium is needed for implantation.
Both assertion and reason are correct but reason is not the correct explanation why endometrium is necessary for implantation of blastocyst. The attachment of a blastocyst to the endometrium is called the implantation. It occurs about 6 days after fertilisation. The endometrium is necessary for implantation as it serves as a key place not only for supporting foetal growth through supplementation of oxygen and nutrients but also for protecting the embryo and later the foetus from microbial invasion during pregnancy. If fertilisation does not occur, the levels of progesterone and estrogens decline due to degeneration of the corpus luteum. Withdrawal of progesterone and estrogens causes disintegration of the endometrium leading to menstruation.