The term used for the gender of a fetus in English is "fetal sex". The prenatal determination of fetal sex is a complex process that involves both genetics and environmental factors. The sex of a fetus is determined by the presence or absence of a Y chromosome. If the fetus possesses a Y chromosome， it will develop into a male， while the absence of a Y chromosome will result in a female.
There are a few different methods available to determine fetal sex， including ultrasound imaging， certain blood tests， and more invasive procedures such as amniocentesis or chorionic villus sampling. Additionally， non-invasive tests， such as those that analyze the DNA present in the mother's blood， have become more common in recent years.
The determination of fetal sex can be important for various reasons. For example， some parents may be concerned about the possibility of inheriting sex-linked diseases， while others may have cultural or religious reasons for wanting to know the gender of their child in advance. However， it is important to note that fetal sex determination should not be used as a means of sex selection or gender preference.
In conclusion， the term used for the gender of a fetus in English is "fetal sex"， and techniques for determining fetal sex have evolved and become more accessible over time. While knowing the gender of a child before birth can be important for various reasons， it is important to approach fetal sex determination responsibly and avoid using it as a means of discrimination or preference.
