At the beginning of the second week, your menstrual bleeding, which started a week ago, ended 2-3 days ago. You are not pregnant yet, but your reproductive organs continue to prepare for a possible pregnancy.
As your egg continues to mature this week, the lining of the uterus continues to thicken. Only one of the 5-15 follicles (liquid-filled sacs containing eggs), which reach a diameter of 6-8 mm at the end of the first week, continues to grow and reaches 18-20 mm at the end of the second week. The maturation of the egg inside the follicle is simultaneous and compatible with follicle development. Other follicles disappear. The egg within the surviving follicle gains the ability to be fertilized.
The second week is the selection week for the egg to be fertilized. Having a single egg selected ensures that women ovulate once a month. For this reason, approximately 99% of natural pregnancies are singleton pregnancies. About 1% of ovulations may occur more than once, and
These multiple ovulations may also cause multiple pregnancy (such as fraternal twins). Egg division, which occurs in order to reduce the number of chromosomes by half, begins in the 4th month while you are in the womb, but this remains on hold until puberty. During egg maturation, which begins with menstruation, division begins to take action again and begins to wait again at a later stage with ovulation. If fertilization occurs, egg division is completed and half of the chromosomes are transferred to the embryo.
With ovulation, a crack occurs in the follicle wall and the egg and its liquid are thrown into the abdominal cavity. The egg is caught by the fringed end of the tube, which is in contact with the ovary, and is taken into the tube. Special cells in the structure of the follicle left behind after ovulation begin to secrete progesterone hormone. With the effect of this hormone, the intrauterine layer becomes a little thicker and becomes suitable for the attachment and nesting of the embryo.
The life span of progesterone-secreting cells is 14 days. If fertilization does not occur, at the end of 14 days, the progesterone secreted by these cells will decrease, so the egg is expelled and the inner layer of the uterus is shed as menstruation.
The period between the day of ovulation and the next menstrual day is 14 days, and this period is fixed. Practically Ovulation will occur 14 days before menstruation. For example, if you have your period every 28 days, ovulation will occur on the 14th day, and if you have your period every 35 days, ovulation will occur on the 21st day.
If you want pregnancy, after calculating your ovulation day, you will ovulate every 2-3 days within a week starting 3 days before your ovulation day. Your chances of getting pregnant will be higher through intercourse. Symptoms of ovulation can be said to be increased body temperature, groin pain, increased colorless and odorless vaginal discharge, and spotting.
While these changes occur in the uterus and ovaries, the number of cilia cells increases in the tubes under the influence of the estrogen hormone, allowing the egg or embryo to be formed to enter the uterus. A suitable environment is prepared for it to move correctly.
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