It depends on the gestational age. If it is within 1 month, it is generally invisible. Of course, it also depends on whether the routine physical examination of surgery and internal medicine is normal. Need to do the examination: chest X-ray or X-ray, hepatitis B, it seems that if people are recruited in China now, they won't do the hepatitis B physical examination, and the others are medical examinations in internal surgery, otolaryngology and ophthalmology. Usually a physical examination is just a formality. If you are pregnant, it is best not to have an X-ray examination, because X-rays have obvious teratogenic effect on the early fetus.