Biology, 23.12.2019 22:31 tyijiapostell

The menstrual flow is the result of
a. no implantation of a zygote.
b. decreased levels of progesterone.
c. discarded uterine linings.
d. no implantation of a zygote, discarded uterine linings, and decreased levels of progesterone.

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The menstrual flow is the result of
a. no implantation of a zygote.
b. decreased level...