Non-invasive prenatal testing (NIPT) using cell-free fetal DNA found in maternal blood can provide information about fetal sex chromosomes as early as 10 weeks of gestation. This analysis determines the presence or absence of the Y chromosome, indicating a male or female fetus, respectively. For example, if the Y chromosome is detected, the result would indicate a male fetus.
Early knowledge of fetal sex can be beneficial for several reasons, including parental bonding and preparation, facilitating discussions about gender-specific child-rearing approaches, and, importantly, enabling early identification of sex-linked genetic conditions. Historically, determining fetal sex required invasive procedures carrying higher risks. The development of NIPT for fetal sex determination has provided a safer alternative.
