Light pink vaginal bleeding, not necessarily a manifestation of pregnancy, early pregnancy due to the fertilization of the egg to bed, resulting in a small amount of vaginal bleeding, there may be pink bleeding, can not be diagnosed from this symptom is pregnant. Clinical causes of this symptom are many, in addition to pregnancy, may be endocrine disorders and sexual life, stimulation caused by vaginal bleeding, may also be gynecological inflammation, such as vaginitis, cervicitis, endometritis, may cause vaginal bleeding symptoms. If you have sex during ovulation without contraception, the chances of pregnancy are higher, and whether you are pregnant or not needs further examination to be clear. There are many ways to check clinically, you can wait until 20 days after sexual intercourse to check with early pregnancy test paper or 3 days after the next menstrual period is delayed to check with early pregnancy test paper. The earliest test is 10 days after sexual intercourse, go to the hospital to draw blood to check the level of human chorionic gonadotropin in the serum, obviously exceeding the normal value, can be diagnosed as pregnant.