There may be brown discharge when the fertilized egg is deposited, but it is not absolute and there are individual differences. Most women do not have obvious clinical symptoms at the beginning of pregnancy when the fertilized egg is implanted, and there will be no brown discharge. However, some women will experience a small amount of brown discharge when the fertilized egg invades the endometrium and the tiny blood vessels in the endometrium rupture and bleed, accompanied by mild abdominal pain and lumbar pain, which is a normal physiological phenomenon. The amount of brown discharge is relatively small, lasts for about 2~3 days will disappear on its own, without special treatment, but should pay attention to bed rest, forbidden to have sex. There are individual differences in whether brown discharge occurs when the fertilized egg is implanted, do not be too nervous if brown discharge occurs, observe the amount of discharge, if there is a lot of brown discharge or a long period of time, we should check whether it is due to preeclampsia or biochemical pregnancy, and we need to combine with a pregnancy test to determine the cause of the pregnancy and then give progesterone and vitamin E and other medications to protect the fetus treatment.