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Menstrual cycle The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system that makes pregnancy possible. The ovarian cycle controls the production and release of eggs and the cyclic release of estrogen and progesterone. The uterine cycle governs the preparation and maintenance of the lining of the ...
English: This figure contains diagrams of the ovarian, follicular, ovulation, and luteal phase of the menstrual cycle. It also includes the fluctuation of LH, FSH, estrogen, and progesterone throughout the cycle.
Figure 2. Follicular phase diagram of hormones and their origins. Follicle-stimulating hormone (FSH) is secreted by the anterior pituitary gland (Figure 2). FSH secretion begins to rise in the last few days of the previous menstrual cycle, [3] and is the highest and most important during the first week of the follicular phase [4] (Figure 1).
Grab a calendar or download a period-tracking app and denote the first day of your last menstrual cycle as well as any symptoms you experience and how heavy your bleeding is. “I think the data ...
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The ovarian reserve and fertility perform optimally around 20–30 years of age. [18] Around 45 years of age, the menstrual cycle begins to change and the follicle pool decreases significantly. [18] The events that lead to ovarian aging remain unclear. The variability of aging could include environmental factors, lifestyle habits or genetic ...
Ovulation is an important part of the menstrual cycle in female vertebrates where the egg cells are released from the ovaries as part of the ovarian cycle. In female humans ovulation typically occurs near the midpoint in the menstrual cycle and after the follicular phase. Ovulation is stimulated by an increase in luteinizing hormone (LH).
“A ‘cycle’ (from first day of period to first day of period) is divided into two halves: the follicular phase, which is when an egg grows and the luteal phase, which is post ovulation,” Dr ...
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