During pregnancy, many new parents are always full of expectations for their children. With the development of technology, ultrasound can be used to know the health status of the fetus and even the gender of the fetus. So when can the gender of the fetus be determined? Woolen cloth? Are there any precautions to take during an ultrasound examination? Below, the editor of Babao.com will share with you at what stage of pregnancy you can check and predict the gender of the fetus, so that you can prepare in advance before the baby is born.