Question

Distinguish between oestrous cycle and menstrual cycle

Answer 1

menstrual cycle :

1. It occurs in primates (monkeys, apes and human beings) only.

2. This cycle consists of menstrual phase, proliferative phase and the secretory phase.

3. Blood flows in the last few days of this cycle.

4. The broken endometrium is passed out during menstruation.

Oestrous Cycle:

1. It occurs in non-primates such as cows, dogs, etc.

2. It consists of a short period of oestrous or heat (e.g., 12-24 hours in cow) followed by anoestrous or passive period

3. Blood does into flow in this cycle.

4. The broken endometrium is reabsorbed.

5. Sex urge is increased during oestrous period.

6. Female permits copulation only during oestrous period.

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