The implantation occurs about 6-7 days after fertilization, usually around the 3rd week of pregnancy, and not all women experience bleeding from the implantation of the fertilized egg. Women usually have regular menstrual periods, and the gestational week of pregnancy is projected according to the first day of the last menstrual period. Ovulation usually occurs 14 days before the next menstrual period, and after ovulation, the egg and sperm combine to form a fertilized egg, which travels to the uterine cavity and settles in the uterine cavity for about a week or so, and the fertilized egg settles in the uterine cavity for about 3 weeks of pregnancy, and a small number of women will have a small amount of vaginal bleeding when settling in. Not all women will have bleeding on implantation, most women do not have any symptoms when the fertilized egg is implanted. You can determine whether the pregnancy is successful through blood or urine HCG and ultrasound. If you feel unwell, you should go to the hospital.