Genetic testing in first trimester to determine sex of twins?

Genetic testing in the first trimester, often through non-invasive prenatal testing (NIPT), can determine the sex of twins by analyzing cell-free fetal DNA in the mother's blood. This testing typically occurs around 10 weeks of gestation and provides a high accuracy rate for sex determination, along with screening for certain genetic conditions. However, it's essential for parents to discuss the implications and ethical considerations of such testing with their healthcare provider.