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  4. Refer to the given graph representing interplay of different hormones (A-D) during menstrual cycle in women and answer the questions that follow. <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/b-soz12p0tdyeujmn4.jpg /> Which hormone (.A,B,CorD.), is necessary for the final follicular growth and ovulation?

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Q. Refer to the given graph representing interplay of different hormones (A-D) during menstrual cycle in women and answer the questions that follow.
Question
Which hormone $\left(\right.A,B,CorD\left.\right),$ is necessary for the final follicular growth and ovulation?

NTA AbhyasNTA Abhyas 2020

Solution:

In the given graph of hormonal changes during the menstrual cycle, the labellings A, B, C, D represents estrogen, FSH (follicular stimulating hormone), LH (luteinising hormone) and progesterone respectively. Hormone FSH and LH are secreted from the anterior pituitary. In females, FSH induces the development and growth of ovarian follicles and LH also causes follicular growth and induces ovulation from the fully matured Graafian follicles with LH surge. This activity also maintains the corpus luteum formed from the remnant of Graafian follicles to produce progesterone.