Question

Read the given passage and answer the question below.

The reproductive cycle, in female primates, called the menstrual cycle, comprises 28 days in a healthy female. Primata is the order to which monkeys, apes and human beings belong. The duration of the menstrual cycle varies in different females as it is dependent upon a number of factors. However, the average duration amounts to around 28 days.

On which day of the menstrual cycle the LH surge occurs in the body?
[1 mark]

• A. ${11}^{th}$ day
• B. ${14}^{th}$ day
• C. ${20}^{th}$day
• D. $5^{th}$ day

Answer 1

The correct option is B ${14}^{th}$ day

Rapid secretion of LH (luteinizing hormone) occurs on the 14${}^{th}$ day of the menstrual cycle. It is also called LH Surge. This leads to the rupture of the Graafian follicle and the secondary oocyte is released. Hence option b is correct.