Question

Which of the statements are true about the menstrual cycle?

• A. Menstrual cycle is not the same as menstruation.
• B. Chances of fertilisation is most in luteal phase.
• C. Menstrual phase takes place only when egg is unfertilised.
• D. Ovulatory phase ends with maturation of ova inside the ovary.

Answer 1

Answer: (A), (C)

Menstrual phase takes place only when egg is unfertilised.

Menstrual cycle comprises menstrual, follicular, ovulatory, and luteal phase.
Menstruation also known as the menstrual phase is the process in which extra blood and thickened endometrial lining is discharged.
In the follicular phase, an ovum matures in one of the ovaries. Simultaneously, the endometrial lining starts thickening in the uterus.
In the ovulatory phase, the mature ovum is released from the ovary and travels up the fallopian tube where fertilization may or may not take place.
In the luteal phase, the follicle that is left after egg ruptures from the ovary begins to degenerate into corpus luteum.
If the egg is not fertilised, the unfertilised egg along with endometrial lining is shed through the vagina. Menstrual phase therefore takes place only when the egg is unfertilised.