Question

1. Explain the diestrus cycle of a mouse

2. Explain the late metestrus cycle of a mouse

Answer 1

1. The diestrus cycle of a mouse is categorized by the activity of corpus luteum which produces progesterone. In this phase, estrogen stimulation declines and corpus luteum starts to form. The uterine lining appears. If pregnancy does not happen the diestrus phase terminates with the degeneration of corpus luteum. Uterus lining does not fall off but reorganized for the next cycle.

2. In late metestrus cycle of a mouse, the end of sexual receptivity starts the beginning of metestrus, the postovulatory phase dominated by corpus luteum function. During this period, serum estrogens decrease and progesterone increases. A fully developed corpus luteum has a notable influence on the uterus.