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How do Organisms Reproduce? — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceHow do Organisms Reproduce?2 Marks
Question
What changes are observed in the uterus if fertilisation does not occur?
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Answer

If fertilization does not occur, thickened endometrium (inner lining of uterus) is disintegrated and sloughed off during menstruation phase (day 1-5). Endometrium is needed to support implantation and nutrition of embryo only under pregnancy and is otherwise disintegrated as it does not have any function in non pregnant woman.

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