Answer:
There are 4 phases of menstrual cycle:
The first phase which is the follicular phase...
Follicular phase
- High levels of FSH secreted
- Function is to stimulate follicles in the ovaries
- One follicle begins to ripen and brings an egg to maturity
- Follicle secretes estrogen
- Endometrium proliferates
The second phase which is the ovulation...
Ovulation
- Follicle ruptures open and releases the ripened egg
The third phase which is the luteal phase...
Luteal phase
- After releasing an egg, the follicle turns into the corpus luteum manufactures progesterone.
- Progesterone secreted by the corpus luteum stimulates the glands of the endometrium to start secreting the nourishing substances.
The last phase which is the menstruation...
Menstruation
- Shedding of the inner lining of the uterus
• Normal menstrual cycle = 20 to 36 to 40 days. Average is about 28 days.
Menstruation begins on day 1 and continues until about day 4 or 5
• Follicular phase extends from about day 5 to about day 13
- Ovulation occurs on day 14
• Luteal phase extends from day 15 to the end of the cycle, day 28
- Mittelschmerz - middle pain; cramping in lower abdomen that occurs during ovulation
