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  4. Given graph represents the interplay of different hormones (A-D) during the 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-lv6hfi1fwjsyyc4e.jpg /> Which hormone is most effective in producing uterine changes during menstrual cycle?

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Q. Given graph represents the interplay of different hormones (A-D) during the menstrual cycle in women and answer the questions that follow.
Question
Which hormone is most effective in producing uterine changes during menstrual cycle?

NTA AbhyasNTA Abhyas 2020

Solution:

In the given graph of hormonal changes during 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 anterior pituitary. In females, FSH induces development and growth of ovarian follicles and LH induces ovulation of fully matured Graafian follicles and also maintains corpus luteum formed from the remnant of Graafian follicles. From this corpus luteum, progesterone is secreted which induces uterine growth of endometrium and develops a vascularised bag for implantation. If pregnancy occurs this corpus luteum remains preserved and continues to produce progesterone until 10 weeks of pregnancy.