What is the higher proportion of test tube babies giving birth to girls?
More and more couples choose to achieve their fertility aspirations through IVF technology. In the process of IVF, it is interesting that the proportion of female babies seems to be higher than that of male babies, which has aroused people's curiosity. This article will elaborate on the reasons for the high proportion of female babies born in vitro from many aspects.
1. Technical reasons
IVF technology has been developing and improving in recent decades. In the process of implementation, scientists can observe and select the sex of the fertilized egg. A common method of sex selection is embryonic chromosome screening. Scientists can determine the sex of the embryo by detecting the chromosomes of the fertilized egg in its early stages of development. This makes it possible to have a higher proportion of female babies.
In addition, hormone therapy and in vitro fertilization technology used by doctors may also have an impact on the proportion of female babies. These techniques may affect the survival and development of male and female embryos in the fertilized eggs. Although these effects are not completely certain, they may be a factor in the high proportion of female babies born in IVF.
2. Individual factors of parents
In addition to technical reasons, parents' individual factors may also have an impact on the proportion of female babies born in vitro. A study found that the relative life span of male sperm carrying Y chromosome is shorter, while that of male sperm carrying X chromosome is longer. This means that in the process of fertilization, the sperm carrying the Y chromosome may die earlier, resulting in a higher proportion of female babies.
In addition, parents' living and eating habits may also have an impact on the sex of IVF. Some studies have shown that foods rich in magnesium and potassium in the diet may increase the probability of giving birth to girls.
3. Environmental factors
Environmental factors may also affect the results of the proportion of female babies born in vitro. First, the culture medium for embryo culture may contain some substances that may play a role in the sex development of the embryo. Secondly, different culture and incubation conditions may also affect the sex of embryos.
In addition, a study showed that the mother's weight and BMI index were also related to the sex of IVF. Women with higher body weight and BMI may have a higher proportion of female babies.
4. Genetic factors
The sex of IVF may also be affected by parental genes. Scientists have found that some genes are related to the sex development of embryos. These genes may affect the sex selection of embryos during fertilization.
In addition, research has found that there is a mutation called BAIAP2 gene in the mother's body, which may lead to a higher probability of giving birth to a female baby. This discovery makes people more aware of the role of genes in the proportion of female babies born in vitro.
Summary
The higher proportion of female babies born by IVF may be due to the combined effect of multiple factors. The development of technology makes it possible to select the gender, and individual factors of parents and genetic factors may also have an impact on the gender of IVF. In addition, environmental factors may also play a role in the proportion of female babies born in vitro. Although these factors are still controversial, the research on the higher proportion of female babies born in IVF will help us better understand IVF technology and reproductive health.
