Menstrual Cycle

The menstrual cycle indicates how normal and functional the female reproductive organs are.

During this period, hormones necessary for the functioning of the genital system are released.
The period prepares the body for a possible pregnancy. Decrease or increase of hormones within the body influences the cycle too.

Hormones liable for the menstrual cycle

Pituitary hormones such as:

  • follicular stimulation hormone (FSH).
  • Luteinized hormone (LH).

Ovarian hormones such as:

  • Estrogen.
  • Progesterone.


Follicular Phase

The follicular phase begins on the first day of the cycle. The level of estrogen and progesterone is at the lowest proportion at this point.

Within the follicular phase, the uterine segment begins to develop. Thus, it prepares for a possible pregnancy. This phase lasts for about 14 days, or until ovulation occurs, when the secretory phase begins.

Secretory Phase

The secretory phase begins during ovulation ovulation, at which point the female ovaries starts to release eggs. It requires luteinized hormone and lasts between 16 and 32 hours. The secretory phase continues until the early day of the subsequent cycle.
If the egg misses fertilization, the amount of estrogen will decrease. Thus, resulting in the elimination of the egg and the newly formed endometrial layer within the menstruation period.


The cycle starts from the first day of a period until the first day of the subsequent period. It lasts between 21 and 35 days in adult women, with a mean of 28 days, in younger adolescents. The cycle can last up to 45 days.

In general, menstruation lasts between 3 and 5 days. Although, It can last between 1 and 7 days, especially within the first two years after the onset of menarche.
You should not be afraid if your menses stay shorter or longer than the specified duration. Hence, you should prepare for this monthly august visitor.

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