define menstrual cycle, implantation & placenta.
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Answer:
Implantation is defined as the process by which the embryo attaches to the endometrial surface of the uterus and invades the epithelium and then the maternal circulation to form the placenta.
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Answer:
The process of ovulation and menstruation in women and in other female pemites.
Explanation:
Plzz rate and follow
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