It usually takes only 1 day for conception to occur. After the ovary ovulates, the egg is caught by the umbrella of the fallopian tube within 10 minutes and then transported to the fallopian tube to wait for the sperm. After the sperm is ejected into the vagina, it usually takes 1.5 hours or 6 hours to reach the juxtaposition of the fallopian tubes, where it combines with the waiting egg to form a fertilized egg, which is the first step in pregnancy. The fertilized egg will enter the uterine cavity after an average of about 10 days. After entering the uterine cavity, it travels for 2-3 days, mainly to find a suitable location and then to implant. Once it has been deposited, the fertilized egg begins to develop and grow.