Some women will encounter such confusion and keep their virginity. When they decide to give their first time to their beloved that night, they find that they are not bleeding after the tense process, and their boyfriend is also very strange. , I always feel that this first time is not perfect. In fact, girls can rest assured. Doctors tell us that about 30% of women will not bleed during sexual intercourse for the first time. Let’s understand the hymen and find out the reasons.

The function of hymen:

Protection theory: The vaginal wall of a girl is relatively thin and her ovaries are immature. The hymen plays a very important role in blocking the invasion of germs, protecting the internal reproductive system and maintaining fertility.

Sexual selection theory: The function of the hymen is to select the strong among men so that excellent sperm can enter the vagina for conception, which has important evolutionary significance. In ancient times, human sexual unions were very arbitrary, and the existence of the hymen could prevent men with low sexual function from occupying women. There is a certain correlation between sexual function and physical strength. People with weak physical strength usually have lower sexual function. The hymen forms a checkpoint. Only those who break the "check" can enter and leave their genes to future generations.

The three stages of change of the hymen

1. Girls’ Generation:

The hymen blocks bacterial invasion

The hymen covers the vagina near the external opening, about 1-2 mm thick, with a small hole in the middle, called the "hymen hole", with a diameter of about 1 cm, usually round, oval or zigzag; some It is half-moon-shaped, with membrane holes on one side; some have partition-shaped holes, with two small holes juxtaposed up and down or left and right; some have many scattered small holes, like a sieve.

During menstruation, menstrual blood is discharged from the body through this small hole. If there are no small holes in the membrane, monthly menstrual blood will be blocked, accumulate in the vagina, expand upward to the uterine cavity and fallopian tube, and even flow into the abdominal cavity, causing fallopian tube damage, intestinal adhesion, and abdominal infection, which is medically called "hymenal atresia" ”, gynecological surgery must be performed.

Before puberty, because the ovaries secrete less estrogen, the vaginal mucosa is thin, the walls are less wrinkled, the acidity is low, and the resistance is weak. The hymen can prevent bacteria from invading the vagina. After puberty, with the development of the ovaries, estrogen in the body increases, vaginal resistance strengthens, and the hymen loses its role.

2. First Night

The hymen does not necessarily break on the first night

When having sex for the first time, the hymen is broken, causing a tear and bleeding. Due to the different shapes of hymens, the degree of rupture will vary greatly. The septum-shaped hymen with two holes bleeds more and is accompanied by more severe pain. The lip-shaped hymen bleeds very little and is almost painless. A thick and elastic umbrella-shaped hymen may not break at all!

According to a survey by American gynecologists, about 30% of women have no bleeding during sexual intercourse for the first time. This 30% includes the highly elastic umbrella-shaped hymen, which may rupture after multiple sexual intercourses or after a crazy sex journey, but it may not bleed. Also included is the porous sieve-shaped hymen, which is highly susceptible to rupture and may have ruptured for various reasons before first sexual intercourse.

Some women will encounter such confusion and keep their virginity. When they decide to give their first time to their beloved that night, they find that they are not bleeding after the tense process, and their boyfriend is also very strange. , I always feel that this first time is not perfect. In fact, girls can rest assured. Doctors tell us that about 30% of women will not bleed during sexual intercourse for the first time. Let’s understand the hymen and find out the reasons.

3. After childbirth

The hymen can be repaired through surgery

As the fetus is delivered vaginally, the hymen is further damaged. Sometimes only a few remaining protrusions are left, called hymen marks. This change does not occur with a C-section delivery.