After the sperm and egg form a fertilized egg, it travels from the fallopian tube to the endometrium and takes about a week to bed. Sperm and egg meet in the fallopian tube to form a fertilized egg, and after a week or so of fertilization, the fertilized egg can pass through the fallopian tube to the endometrium for implantation. The blood chorionic gonadotropin will gradually rise after the implantation, so you can take a blood sample or use a pregnancy test one week after having sex to confirm whether you are pregnant or not. In the early stages of pregnancy, it is necessary to supplement folic acid and vitamins, pay attention to balanced nutrition, ensure that the fertilized egg can develop normally, avoid exposure to toxic substances, pay more attention to rest, and regular obstetric examination to avoid abnormal development of the fetus.