According to the study, the gender of the child is not as accidental as we believed

We all know a typical family formed only by sons or with daughters to create a football team of a female room. This is about couples who challenge randomly Thus, every time they multiply, the currency always falls on one side. He Children’s sex I have to vary with a probability of 50 %, but in these cases everything chooses Same -sex childrenThe field because?

This is a question that many, when the libs asked each other to meet with one of these families. It can be just Evasion of confirmationThe field, that is, we do not look at families consisting of 4 girls and 3 boys, and in which those who have 7 children of the same sex. Others remain unnoticed by our prejudices. That would be most likely. However, according to a new study published by scientists from Harvard School of Public Health in Harvardmaybe something, which affects the fact that some women bring only the world Children of the same sex.

For research, they used records from the database 58 007 womenThey saw the field that, indeed, the number of women who had same -sex children did not correspond to the logical if the child’s sex had a 50 % probability of being a boy or girl. There were many cases when children with the same floor. After these data were observed, they applied for possible explanations in order to choose a balance on one or another side and found both environmental and genetic problems. There are scientists who continue to find lagons in this study and claim that the sex of the child is just an accident. The debates are open, but let’s see what these researchers observed.

Why is it so strange that I only have children of the same sex?

The gender of the child is determined by sperm, which can be fertilized by the egg. Only one can introduce an egg X chromosomeWhile sperm can carry X or one y.

Both eggs and sperm, but have the difference with other human cells (they also have other animals, but we are concentrated in humans). While the rest of the cells have 46 chromosomes distributed in 23 pairs, an egg and sperm, known as gametes, They have only 23 chromosome. Thus, when they join the fertilization, they can lead to ziids, from which 46 chromosomes will appear: 23+23.

The process in which this separation of chromosomes, which leaves the gamet only with a half, is known as meiosis. Since male cells have xy chromosomes, 50 % sperm It should be like throwing a currency into the airThe field but, according to the fact that many believed that they once thought, and, above all, according to Harvard’s new study, this is nothing so accidental.

In the past, it was believed that the floating ability of sperm can vary depending on whether they carry Xoy and that this can affect the child’s floor, but these studies are almost completely discarded.

What decantes the balance only for sex?

The first fact that attracted the attention of these scientists was that women who began to have children in Older They were more likely than the gender of the child was always the same. The same thing happened to those who had many children. Perhaps the latter is nothing more than a coincidence, since when someone has the first child, there is nothing that determines how much it will have later. Therefore, for this it would not be logical to influence the floor of the child.

Yes, maybe something related to age, but above all genetics. And, as these scientists saw, there is a gene called CYP2U1 It seems that this affects the fact that a woman has only children of the same sex. On the other hand, they saw that those who have a specific gene version NSUN6 They only had daughters, while those who carry the gene option TSHZ1 They, as a rule, had only children.

So, can you make sure that the gender of the child is not accidental?

There is no answer. These scientists conducted their research with data from 58,000 women, which is a very large sample. However, other studies include the data of millions of women, do not indicate the same. In these cases, this is visible Clear accident.

According to Harvard scientists, data can be changed by cases of steam that continue to have children until they become the desired floor. For example, if they want girls and have only children, they can have 4 or 5 men until they become a child’s sex. In this case, it will appear as a couple with children of different sexes, but this Anomalous data The results are again with their hypothesis.

Despite this, other scientists argue that their study is not diverse enough. 95 % of participants White women from the United StatesThe field of the sample is necessary with greater variability in order to be able to give results as something more convincing. This is true. However, this is an interesting thread to quit. And it may happen that in all this there is a lot of bias in confirmation, but who knows? There is also some science that explains the imbalance. In the end, do not even throw a coin with accident.