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Proestrus is the initial phase of the menstrual cycle. The female Corman Shepherd goes through a variety of physical changes during this period, which lasts an average of 9 days but might vary. Her vulva might enlarge and she could have a bloody discharge. Unfortunately, she is not sexually responsive during proestrus.
Next comes estrus, sometimes called the "standing heat." This is the window of time within which a woman may conceive a child sexually. It typically lasts between 9 and 10 days after proestrus begins, however it may last anywhere from 3 to 21 days. The bloody flow may lighten or become more straw-like during estrus. The female may become more outgoing, urinating often to attract men, and more sexually active.
Diestrus: The luteal phase, or what happens after estrus in a woman. During this period, which lasts from 60 to 90 days on average, the reproductive system gets ready for a possible pregnancy.
Pseudo-pregnancy occurs when a female exhibits pregnancy symptoms but is not really pregnant after mating. Physical and behavioral changes, including as nesting behavior and enlarged mammary glands, may occur as a result of hormonal shifts that occur during diestrus.
A woman's reproductive cycle ends in a phase called anestrus. This is the time when the reproductive systems of women is at rest. This time allows the body to rest and rejuvenate before the next heat cycle.