On which day of menstruation do you usually ovulate?

For women, in addition to the menstrual period, another thing they need to pay attention to is the ovulation period. The ovulation period of different women is also different, but the specific date needs to be calculated. The calculation of ovulation period is generally closely related to the menstrual period. So, on which day of the menstrual period does ovulation usually occur? Let’s talk about it today and hope that everyone can calculate their ovulation period.

Ovulation day is the day when the egg is released. Under normal menstruation conditions, a woman's ovulation period is counted from the first day of the next menstruation, and the ovulation day is 14-16 days counted down. The 5 days before and 4 days after the ovulation day are added together to form the ovulation period.

Fertilization is more likely during ovulation. The most fertile time is from the day before ovulation to the day of ovulation. It mainly discharges secondary oocytes, i.e. egg cells. After this secondary oocyte enters the fallopian tube, it undergoes the second meiotic division in the fallopian tube. This division occurs after fertilization, after the sperm nucleus enters the secondary oocyte. As a result of the division, a large effective cell, the egg cell, and a polar body that cannot be fertilized are produced. Normal women of childbearing age have menstruation once a month. The period from the beginning of this menstruation to the first day of the next menstruation is called a menstrual cycle. For example, from the perspective of contraception, each menstrual cycle of a woman can be divided into the menstrual period, ovulation period and safe period. A woman's ovulation date is generally about 14 days before the next menstrual period. The 5 days before and 4 days after ovulation, together with the ovulation day, a total of 10 days are called the ovulation period. Ovulation can usually be detected through B-ultrasound or ovulation detector.

In fact, ovulation bleeding is a phenomenon that every female friend may experience. Generally, the amount of bleeding is very small and cannot be observed with the naked eye, but some people will have obvious bleeding symptoms, and the severity cannot be generalized. But in fact, the main reason for ovulation bleeding is that after the mature follicle ruptures and ovulates, the estrogen level drops sharply and significantly, which cannot maintain the growth of the endometrium, causing local ulceration and shedding of the surface layer of the endometrium, resulting in a small amount of breakthrough bleeding, and with the formation of the corpus luteum of the ovary.

Sufficient estrogen and progesterone are secreted to quickly repair the ruptured surface of the endometrium and stop the bleeding. Or it is possible that during ovulation, the mature follicles secrete more estrogen, causing endometrial congestion and leakage of red blood cells. It is also possible that when the egg is captured in the fimbria of the fallopian tube, the blood-containing follicular fluid is sent to the uterine cavity through the retrograde peristalsis of the fallopian tube and then flows out of the cervix through the vagina.

When examining the cervical mucus of women who ovulate during the mid-term period, it is found that about 60% of them have red blood cells under microscopic observation, but no bleeding can be seen with the naked eye. This is not a pathological phenomenon; but women with ovulation bleeding must rule out other reproductive tract diseases, such as irregular menstruation, cervical erosion, cervical polyps, cervical cancer, endometrial polyps, submucosal uterine fibroids, endometrial adenocarcinoma, etc.

Of course, it is also possible that the secretion of sex hormones is out of balance, causing the hormone levels to fluctuate greatly during ovulation and resulting in obvious bleeding. Chronic inflammation of the endometrium or inflammatory thickening of the ovarian surface causes significant endometrial congestion during ovulation, and bleeding is not easy to stop on its own, or the inflammatory thickened follicle surface ruptures and bleeds more than normal, and flows back into the uterine cavity with the peristalsis of the fallopian tube and is discharged from the body through the vagina.

Vaginal bleeding visible to the naked eye may last for several hours, or 3 to 5 days, but rarely for more than 7 days. In severe cases, it may continue to occur until the next menstrual period. Some women have very little bleeding, which stops with a few drops, or there is blood mixed in the vagina. Generally, it rarely reaches the amount of menstruation. Bleeding may be accompanied by distension and discomfort, dull pain or obvious pain in one side of the lower abdomen, and may even involve the waist and inner thigh. Symptoms may occur continuously every month or every other month. For some people, they occur for several months each year, while for others, they only experience this phenomenon once in their lifetime.