Question

Observe the diagram menstrual cycle and answer the following questions:
Hypothalamus
FSH
Changes
the ovary during
Menstruation
Corpus
Corpus luteum albicans
Fully prown follicle
Ovulation
Progesteront and
estrogens
Estrogens
Beginning
menstruation
13
ve
during
menstruation
1214 $478 10 11 12 04 15 16 17 18 19 20 21 22 23 24 25 277 213
Pened of Penod of
Peniod of secretions of
Menstruaton regeneration Ovulation glands in endometrium
of endometriem
period
1) What is the period of menstruation?
On which day does ovaluation occur during menstrual cycle?
ui) In menstrual cycle which reproductive organs undergo changes?
) Which period is said to be period of regeneration of endometrium?
V Which period is said to be period of secretions of glands in endometrium?​

Answer 1

Answer:

Menstruation is the cyclic, orderly sloughing of the uterine lining, in response to the interactions of hormones produced by the hypothalamus, pituitary, and ovaries. The menstrual cycle may be divided into two phases: (1) follicular or proliferative phase, and (2) the luteal or secretory phase. The length of a menstrual cycle is the number of days between the first day of menstrual bleeding of one cycle to the onset of menses of the next cycle. The median duration of a menstrual cycle is 28 days with most cycle lengths between 25 to 30 days (1-3. Patients who experience menstrual cycles that occur at intervals less than 21 days are termed polymenorrheic, while patients who experience prolonged menstrual cycles greater than 35 days, are termed oligomenorrheic. The typical volume of blood lost during menstruation is approximately 30 mL (4). Any amount greater than 80 mL is considered abnormal (4). The menstrual cycle is typically most irregular around the extremes of reproductive life (menarche and menopause) due to anovulation and inadequate follicular development (5-7). The luteal phase of the cycle is relatively constant in all women, with a duration of 14 days. The variability of cycle length is usually derived from varying lengths of the follicular phase of the cycle,