BIOLOGY
BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 51, Problem 1DA
Summary Introduction

Todescribe: The stages of the menstrual cycle in which the levels of the follicle-stimulating hormone arehigher than those of luteinizing hormone.

Introduction: The menstrual cycle consists of a monthly series of variations that occur in the female body for the preparation of pregnancy. The menstrual cycle includes four steps that are ovulatory, luteal, menstrual, and follicular. Hormones such as follicle-stimulating hormone and luteinizing hormone play a vital role in the menstrual cycle.

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Menstruation is the monthly bleeding in women. During the end of the menstrual cycle, the level of follicle-stimulating hormone exceeds the level of luteinizing hormone. The menstrual cycle starts with bleeding and considers as day 1, and the cycle ends just before the beginning of the next menstrual cycle.

The menstrual cycle is of around 28 to 36 days. The menstrual cycle is controlled by hormones that are produced by pituitary glands such as luteinizing hormone and follicle-stimulating hormone. These hormones further stimulate the production of progesterone and estrogen. Approximately around 27-28 and 1-2 in 28 days cycle, the level of follicle-stimulating hormone ishigher than the luteinizing hormone.

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