Ultrasound is a non-invasive and safe test during pregnancy, so it is usually the standard method for determining whether the baby on the way is a boy or a girl. However, although the fetal sex may be determined a few weeks earlier, it is most often not revealed until the 20th week of gestation, when the second trimester ultrasound is usually performed.
If the baby's position allows, the specialist will try to observe the baby's genitalia. If the penis and scrotal sac can be distinguished, it is a boy. Otherwise, if no male genitalia are seen or if the labia majora are visible, it is a girl.
Read the full article on: When and how can you know for sure if it will be a boy or a girl? ( 46).
By Sarai Arrones BSc, MSc (embryologist), Silvia Azaña Gutiérrez B.Sc., M.Sc. (embryologist) and inviTRA Staff.
Last Update: 04/04/2023