Currently, it is not possible to change the gender of an embryo. Gender is determined by the chromosomes that an embryo inherits from its parents. Embryos with XY chromosomes will develop into males, while embryos with XX chromosomes will develop into females.

There are some experimental techniques that have been proposed for changing the gender of an embryo, but these techniques are not yet available or safe. One technique involves using CRISPR-Cas9 gene editing technology to remove the Y chromosome from an XY embryo. This would result in an embryo with XX chromosomes, which would develop into a female. However, CRISPR-Cas9 is a very precise tool, and there is a risk that it could accidentally alter other genes in the embryo.

Another technique that has been proposed involves using hormones to induce changes in the development of an embryo. For example, testosterone could be given to an XX embryo to promote the development of male sex organs. However, hormones can have other effects on an embryo’s development, and it is not clear if this technique would be safe or effective.

Overall, there is no safe and effective way to change the gender of an embryo. Gender selection is a controversial topic, and there are ethical concerns about using these techniques. It is important to talk to a doctor if you are considering gender selection.

As of my knowledge cutoff in September 2021, it is technically possible to select the sex of an embryo through a process called preimplantation genetic diagnosis (PGD) or preimplantation genetic screening (PGS). However, the use of PGD/PGS for non-medical reasons, including gender selection, is controversial and regulated differently in various countries.

PGD/PGS involves the screening of embryos created through in vitro fertilization (IVF) for genetic abnormalities or specific traits before they are implanted in the uterus. This process can involve the identification of embryos with a specific sex, allowing for the selection of embryos of the desired gender for implantation.
It’s important to note that the use of PGD/PGS for gender selection purposes is often subject to legal and ethical considerations. In many countries, it is restricted or prohibited unless there is a specific medical reason, such as preventing the transmission of a genetic disorder linked to a particular sex.

The regulations and guidelines surrounding the use of PGD/PGS, including gender selection, vary by country and jurisdiction. It’s crucial to consult with fertility specialists, reproductive medicine clinics, or healthcare professionals experienced in assisted reproductive technologies in your specific region to understand the local regulations, ethical considerations, and available options for gender selection during the IVF process.

It’s worth noting that societal attitudes and regulations surrounding gender selection may evolve over time, and it’s important to stay updated with the most current information and legal requirements in your respective country or region.