Question

what is periods please explain in biology​

Answer 1

Answer:

Menstruation is the recurring discharge of blood, cervical mucus, vaginal secretions, and endometrial tissue of a nonpregnant females of humans and other animals (e.g. certain primates, shrews, and bats.

Explanation:

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Answer 2

Answer:

Menstruation is the recurring discharge of blood, cervical mucus, vaginal secretions, and endometrial tissue of a nonpregnant females of humans and other animals (e.g. certain primates, shrews, and bats. ... The first day of menstruation is used for determining the date of the last menstrual period or LMP.

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