Whether the male female ratio of the second generation test tube babies is related to heredity
The second generation of IVF refers to the second generation of children produced through IVF technology. Previous studies have shown that the ratio of male to female in the whole population is about 50:50, but some studies have found that there seems to be some deviation in the ratio of male to female in the second-generation IVF. This attracted people's attention, and researchers began to explore the relationship between the male female ratio of the second generation of IVF and heredity.
1. Influence of genetic factors on male female ratio
According to a study conducted at the University of California, Los Angeles, the United States, parents' genetic factors may have an impact on the male female ratio of second generation IVF babies. By analyzing the genome data of thousands of second generation IVF, researchers found that the variation sites related to sex determination in the parents' genes were related to the ratio of male to female in the second generation IVF.
In addition, a study conducted in Shengjing Hospital affiliated to China Medical University reached a similar conclusion. Through the analysis of the data from three IVF centers, the study found that the father's genetic factors were positively correlated with the male female ratio of the second generation IVF infants.
These studies suggest that genetic factors may have an impact on the sex ratio of the second generation IVF. However, more research is still needed to further verify and explain this relationship.
2. The impact of IVF technology on the proportion of men and women
Test tube baby technology is a kind of technology that helps infertile couples to reproduce through in vitro fertilization or embryo transfer. Some studies have found that IVF technology may have an impact on the ratio of men to women.
According to a study by the University of California, San Francisco, the proportion of baby boys born through IVF technology is relatively high. The researchers speculate that this may be because the specific characteristics of male sperm make it easier to fertilize during IVF.
However, some studies have shown that IVF technology has no effect on the ratio of men to women. For example, a study conducted at the University of Manchester in the UK did not find that there was a significant shift in the proportion of men and women in IVF.
3. Other influencing factors
In addition to genetic factors and IVF technology, there are other factors that may have an impact on the male female ratio of second generation IVF babies.
Age is a possible influencing factor. The study found that there was a correlation between the increase of parents' age and the increase of the proportion of male offspring. This may be because the father's sperm quality decreases with age, thus increasing the proportion of male offspring.
In addition, some studies also pointed out that environmental factors may have an impact on the male female ratio of second-generation IVF infants. Chemical substances in the environment, dietary habits and other factors may have an impact on the reproductive system, thus affecting the proportion of men and women.
4. Summary
To sum up, the male female ratio of second-generation IVF may be related to genetics and IVF technology. The genetic factors of parents may affect the male female ratio of the second generation IVF, and the IVF technology itself may also affect the male female ratio. In addition, age and environmental factors may also have an impact on the sex ratio of second generation IVF infants.
However, the current research is still limited, and more research is needed to verify and deeply understand this relationship. Further research may help to unravel the close relationship between the male female ratio of the second generation of IVF and genetics.
