When does the fetal scrotum descend?

Everything in the world follows certain rules in the process of growth, and by following these rules we can understand many things people want to know. When the fetus is in the mother's body, we can only understand the development of the fetus through some medical instruments. However, when the fetus is in the mother's body, the development of many organs will change within a certain period of time. If it is a male fetus, when will the scrotum descend? Let me tell you in detail below.

1. When does the fetal testicle descend?

When the fetus is about four weeks old, the reproductive cells that produce sperm slowly move from the dorsal side of the yolk sac outside the embryo to the inner side of the genital ridge through amoeba movement and merge with the testicles. Around the seventh week of gestation, the instrument can identify the position and shape of the testicles. After the testicles decide to leave the human body, they begin to slowly descend, and the descent process has two stages.

Phase 1

From the earliest place where the feet stopped, the two sides of the center of the posterior abdominal wall descend to the inguinal ring. That is, in the inguinal ring, it descends under the control of a substance called MIF. MIF also causes the testicular frenulum outside the inguinal ring to develop into the scrotum. The so-called MIF substance is the English abbreviation of female reproductive organ inhibitory factor. As the name suggests, it causes the tissue that will develop into female reproductive organs in the future to atrophy. It is produced by the sex-determining gene (SRY) on the Y chromosome in the sertoli cells that nourish the germ cells.

Second stage

Under the influence of male hormones produced by the fetal testicles, the testicles descend from the groin to the scrotum. There is a placental sex hormone HCG in the placenta that can stimulate the fetal testicles to produce male hormones. Some people say that the testicular frenulum is related to the ability of the testicles to descend into the scrotum at this stage, while others say that it is not related. There is no definitive conclusion yet. The testicles begin to slowly descend when the fetus is seven months old and continue until birth. By the time the fetus is nine months old, the testicles have roughly reached the scrotum. But some fetuses have testicles that have not descended into the scrotum at birth. Usually, they will enter the scrotum three months after birth. If they do not descend to the scrotum after birth, it is considered abnormal testicular descent.

2. How to identify boys and girls

There are many ways to distinguish between men and women, but I don’t know which one is accurate. In fact, the method of going to the hospital for four-dimensional testing is relatively accurate. Let's compare ourselves and take a look together!

If the pregnancy is mild, it is a boy; if the pregnancy is severe, it is a girl.

The one with a belly that looks like a basketball is a boy, and the one with a belly that looks like a watermelon is a girl.

The areola will darken in boys, and vice versa in girls. If the fetus is in a lower position during pregnancy, it is a boy; if it is in a higher position, it is a girl.

Boys tend to have drier skin on their hands, while girls tend to have drier skin on their hands.

After pregnancy, the skin of boys becomes better than before, while the opposite is true for girls.

The feeling of fetal movement, punching, kicking and whole body flipping, is a boy, while only whole body flipping is a girl.

In urine tests, acidic pH values ​​are for boys and alkaline values ​​are for girls.

If the BC gestational sac in the early stages of pregnancy is eggplant-shaped, it means it is a boy, and if it is round, it means it is a girl.

If the pregnancy line is thin and long, it is a boy; if it is thick and short, it is a girl.