During which estrous stage do ovaries contain developing ova?

During which estrous stage do ovaries contain developing ova?

• A. Metestrus
• B. Estrus
• C. Proestrus
• D. Diestrus

Answer: (C)

Developing ova are present when ovarian follicles are maturing, which happens during proestrus. In this stage, follicles grow under the influence of FSH, estrogen begins to rise, and the oocytes inside the follicles mature toward a pre-ovulatory state. Ovulation occurs later in estrus, when a mature oocyte is released. After ovulation, the cycle moves into metestrus and diestrus, where the corpus luteum forms and there aren’t actively developing follicles. So, the stage with developing ova in the ovaries is proestrus.

Developing ova are present when ovarian follicles are maturing, which happens during proestrus. In this stage, follicles grow under the influence of FSH, estrogen begins to rise, and the oocytes inside the follicles mature toward a pre-ovulatory state. Ovulation occurs later in estrus, when a mature oocyte is released. After ovulation, the cycle moves into metestrus and diestrus, where the corpus luteum forms and there aren’t actively developing follicles. So, the stage with developing ova in the ovaries is proestrus.