In non-primate mammals like cows, sheep, rats, deer etc, the cyclical changes that occur during reproduction are called oestrus cycle whereas in primates it is called as menstrual cycle. How can we distinguish between them?
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Answer:
MENSTRUAL CYCLE ESTROUS CYCLE
1. Menstrual cycle primarily occurs in primates, is a monthly cycle repeated at an average interval of 28-29 days normally between the age of menarche until menopause. 1. Estrous cycle occurs in non-primates and starts after sexual maturity attain by the female of the species interrupted by anestrous phases or passive period.
2. The long phase menstrual cycle is divided into three phases consists of menstruation,proliferative phase, and secretory phase. 2.The short phase estrous cycle has estrus - (known as "in heat" period), metestrus, and anestrous or passive period.
3. Menstrual bleeding or blood flows in the last for a few days (2-7 days normally) . 3. In estrous cycle blood flows into the cycle is often mistaken for menstruation .
4. The broken endometrium layer along with blood is shed off during the menses. 4. Endometrium is reabsorbed if conception/copulation does not occur during the cycle.
5. The female of species with menstrual cycle can be sexually active at any time in their cycle , even when they are not ovulating.
In non-primate mammals like cows, sheep, deer, dog, tiger, etc., such cyclical changes during reproduction are called oestrus cycle whereas in primates ( monkey, apes and humans) such cyclical changes are called Menstrual cycle.....