1. Scientific perspective on the sex ratio of IVF

According to the latest research and statistical data, there is no significant deviation in the sex ratio of IVF. Globally, the ratio of male to female in vitro babies is basically similar to that of naturally conceived babies

Maintain at 102~107:100. This shows that IVF technology itself does not lead to an imbalance in the gender ratio.

Second, the relationship between high-quality embryos and gender

The view that high-quality embryos may be more inclined to boys may stem from a misunderstanding of certain research results. In fact, the evaluation of high-quality embryos is mainly based on their morphological scores and hair development

Fertility potential is not directly related to the gender of the embryo. Although data shows that in some cases, such as frozen embryo transfers, the proportion of boys may be slightly higher, this does not mean that high-quality embryos themselves are more favorable.

is directed towards boys, but may be related to the stage of embryonic development and transplantation technology.

3. X chromosome inactivation mechanism and sex ratio

Experiments by China researchers have found that the gender imbalance in test-tube babies may be related to the weakening of the X chromosome inactivation mechanism. This discovery reveals the physiological mechanism of the imbalance in the sex ratio, adjusting in vitro for the future

The cultivation system for fertilization provides the possibility to achieve a more balanced sex ratio.

4. Legal and ethical perspectives

From a legal perspective, my country prohibits XY selection for non-medical fetuses. This means that even if XY selection is technically possible, medical institutions

XY selection is not allowed.

5. Specific data and research results

1. Sex ratio of IVF:

According to statistical data, the ratio of male to female in vitro babies is basically similar to that of naturally conceived sex, maintaining at 102 to 107:100.

Between 2001 and 2015 in China, 5832 mothers gave birth to 7410 babies in vitro, of which 3902 were boys and 3508 were girls, with a ratio of approximately 1.11: 1.

2. High-quality embryos and gender:

The evaluation of high-quality embryos is mainly based on their morphological score and development potential, and has no direct relationship with the sex of the embryo.

Data shows that in some cases, such as frozen embryo transfer, the proportion of boys may be slightly higher, but this does not mean that high-quality embryos themselves tend to be boys.

3. Technology choice and gender:

In the first generation of IVF, male embryos developed faster and were easier to implant.

In the second generation of IVF, sperm (female) with X chromosome are more likely to show a normal appearance and are easier to be screened.

The third-generation IVF technology can be used for genetic diagnosis before embryo transfer, and prenatal genetic diagnosis can be performed on people from families with genetic diseases and infertility. For some special cases, fetal sex can be chosen

No, but my country prohibits selecting the gender of children through any technical means.