State the changes that take place in the uterus when
a. Implantation of embryo has occurred
b. female gamete/egg is not fertilized
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(a) Changes in uterus when implantation occurred: Uterus prepares itself to nurture growing embryo. Its lining thickens. It is richly supplied with blood to no wish growing embryo. (b) If ovum does not get fertilised: Then the thick and soft inner lining of uterus is no longer required; so it breaks
Explanation:
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