How to have a boy and a second child.
There are many secrets of second-born boys circulating among the people, such as eating more alkaline food, creating orgasm or taking a backward sexual position. Although these methods are considered to be helpful for pregnant women to give birth to boys, they lack scientific basis. The sex of the fetus is determined by male Y sperm. The following are some secrets of twin boys for reference only.
1, eat more alkaline food during pregnancy: the acidity and alkalinity of food can change the pH of the body, and the female vagina secretes alkaline substances, which is suitable for the survival of Y sperm, so it is easier to have boys.
2, alkaline water to wash the vagina: wash the vagina with alkaline water, change the pH of the vagina, thereby increasing the chance of having a boy.
3, creative orgasm: orgasm can weaken the acidity of women's vagina, is conducive to the activity of Y sperm, and increases the possibility of having a boy.
4, change the posture of the same room: the posture of the same room chooses standing posture or leaning back posture. This posture can make the penis deeper, make it easier to send Y sperm into the uterus, and help Y sperm combine with eggs.
5, summer pregnancy: If you want to have a boy, it is best to get pregnant in summer. High temperature will affect the X chromosome of sperm and create favorable conditions for boys.
6. Childbearing age should not be too late: The number of sperm in men will decrease with age, so it is best to choose to give birth at childbearing age to avoid giving birth at an advanced age.
The secret of having twins
If mothers want to have both sons and daughters, the ideal way to have a second child is to have twins, so how can they have twins? There are three main ways: find a wife with twin genes, test-tube babies and eat more folic acid.
Method 1: Find a genetic wife with twins.
Twins mainly look at their mother's genes. Even if the father's family has twin genes, the chances of having twins are not great. The twins are a kind of twins. Because two fertilized eggs develop into embryos respectively, twins of different sexes will be formed. So how can we have two fertilized eggs? It depends on luck, because under normal circumstances, the woman only releases one egg every month, but in a few cases, she will release two eggs, and both eggs are fertilized, so they may be twins.
Method 2: Test-tube babies can have as many as they want.
"IVF" promotes the development of follicles in women's ovaries through ovulation induction technology, and then takes out eggs from them for in vitro artificial fertilization, and then transplants the developed embryos into the uterus for pregnancy. Because this process is carried out under the manual control of doctors, in order to ensure the quality of fertilized eggs, several eggs are usually fertilized. When they develop to a certain extent, the best 2 ~ 4 eggs are selected and implanted into the uterine cavity of the mother. Finally, the best embryos stay in the uterus and develop until the fetus is born.
Method 3: Eat more folic acid.
For women who want twins, eat more folic acid. According to the latest research by a Swedish medical research institution, the chances of women taking folic acid giving birth to twins are nearly twice as high as those who don't. According to reports, Swedish researchers began to study and analyze the information and data of local pregnant women taking drugs from 1994. They found that among 2,569 pregnant women who took folic acid, 2.8 out of every1000 children were twins, while among pregnant women who did not take folic acid, the ratio was 1.5. The researchers pointed out that it is not clear why taking folic acid increases the chances of having twins. According to experts' estimation, folic acid supplementation may increase the number of ovulation, so that multiple eggs enter the uterus, thus giving birth to twins.