Eyelash extensions are not recommended during pregnancy and may affect the development of the fetus. During pregnancy, the fetus is developing and growing, and if it is exposed to external stimuli, it is likely to suffer from poor development or pre-miscarriage. If the process of eyelash extensions is not sterilized properly, it is very likely that the pregnant woman will be infected, which will affect the development of the fetus. For the sake of the health of the pregnant woman and the development of the fetus, try not to have eyelash extensions, nails or makeup done during pregnancy. It is also very important to stay away from undesirable environments, such as second-hand smoke, chemical factories, newly renovated houses, etc., do not contact living. Note that if any physical discomfort occurs during pregnancy, it is important to seek medical attention in a timely manner.