Is the pregnancy a boy or a girl?

Nowadays, pregnant women need to pay attention to their daily three meals, diet arrangements, daily living habits and sleep time during pregnancy. However, many mothers are more concerned about whether they are pregnant with a boy or a girl. Now that men and women are equal, mothers want to know the gender of the baby, mainly to prepare the supplies needed for the baby after birth in advance. If the upper part of the uterus is pregnant, does it mean that it is a boy or a girl?

Two sets of reproductive organs are pre-implanted in the fetus

Humans are actually born with two sets of reproductive systems. Two sets of internal reproductive organs are already implanted in the fetus 8 weeks before the fetus develops. These two sets of internal reproductive organs are called "mesonephric duct" and "paramesonephric duct" respectively. That is to say, before 8 weeks of pregnancy, no one knows the gender of the fetus.

When the embryo develops to 8-10 weeks, the male fetus will develop testicles and begin to secrete androgens, which cause the fetus's external genitalia to develop and change in the male direction. For fetuses without testicles, due to the lack of androgen effects, the external genitalia will naturally develop in the female direction. From then on, the fetus was divided into male and female.

Who decides whether to have a boy or a girl?

Myth 1: The father decides whether the baby is a boy or a girl

Each person has two chromosomes, males have YY chromosomes and females have XX chromosomes. Because mothers can only provide X chromosomes, while fathers can provide both X chromosomes and Y chromosomes, fathers have more say in the issue of whether a baby is a boy or a girl. Genetic knowledge also proves that if the sex chromosome of the sperm is an X chromosome, a girl will be born, and if it is a Y chromosome, a boy will be born.

It has also been scientifically proven that men inherit a tendency to have more sons or more daughters from their parents. This means that men with more brothers are more likely to have sons, while men with more sisters are more likely to have daughters.

Myth 2: The gender of a baby is determined by the mother

It is said that the different shapes of male and female sperm cause them to move at different speeds in the sticky reproductive tract, so the animal mother can actively speed them up or slow them down accordingly. A study conducted on mammals by the Stanford University School of Medicine in the United States showed that the gender of the offspring is under the full control of the animal mother, who will choose whether to give birth to a boy or a girl based on the living environment, nutritional conditions and the health of the animal father.

Myth 3: The more difficult it is to get pregnant, the more likely it is to have a boy

Dutch researchers surveyed 5,283 women who gave birth to a child between July 2001 and July 2003. The researchers calculated that for couples trying to conceive naturally, every additional year they go without trying to conceive increases their chances of having a boy by 4 percent. In other words, the more difficult it is for a woman to get pregnant, the more likely she is to give birth to a boy.

Is there really such a thing as "female to male"?

On the Internet, many pregnant mothers will discuss "girl to boy" or "boy to girl", but in fact, the gender of the fetus is determined at the moment the fertilized egg is formed, and there is no such thing as "girl to boy" or "boy to girl". The focus of everyone's discussion is that some pregnant mothers choose to go to a "private clinic" to identify the sex of the fetus, but the sex of the fetus at birth is opposite to the result of the "test".

In fact, the accuracy of B-ultrasound examination of the fetus's gender is not 100%. No one can guarantee that the fetus's gender is accurate. The accuracy of the gender examination varies in different months of the fetus. Therefore, you must be cautious when identifying the fetus during pregnancy, otherwise it will cause unnecessary trouble to yourself and your family. It is better to wait for the baby to be born and give you a big surprise!