ESTROUS CYCLE: In animals using estrous cycles, proestrus occurs before the estrus phase. Proestrus therefore most...

ESTROUS CYCLE: In animals using estrous cycles, proestrus occurs before the estrus phase. Proestrus therefore most closely corresponds to which uterine or ovarain phase(s) in humans?

Group of answer choices

follicular phase and ovulation

secretory phase

ovulation and luteal phase

proliferative phase

menses

Expert Solution

proliferative phase

Proestrus and estrus phase occur in the phase of follicular or proliferative phase in the ovarian cycle, in which ovulation taking place at the end of estrus phase.
There are four phases of estrous cycle , they are:-
Proestrus ,Estrus, Metestrus ,Diestrus or pseudopregnancy separated by a variable period of quiescence, the anoestrus.
Metestrus or Diestrus phase corresponds to ovulatory phase in ovarian cycle.
There are no marked qualitative difference between diestrus and pseudopregnancy , in which latter corresponds to prolonged diestrus.
In proestrus phase there is marked change in female reproductive system , but particularly uterine growth and endometrial proliferation.
Ovulation occur in the estrus phase , hence Option A is incorrect , in which proestrus phase doesnot denote both proliferative and ovulation.
Option B,C and E all are wrong , because proestrus phase corresponds to proliferative phase.

Sydney Mullin answered 1 year ago

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