Theoretically, the birth of a child takes about 280 days from the beginning of pregnancy to the birth of the child, but in reality, the child is not born at the full 280 days, and many of them may be born earlier, or within two weeks later. In other words, it is normal to count pregnancy from the first day of the last menstrual period, between 266 and 294 days of pregnancy. The time of pregnancy is usually counted from the first day of the last menstrual period, not from the time of intercourse or from the time when the fertilized egg completes its implantation. If you count from the time of intercourse, then the time between pregnancy and the birth of the child is around 266 days. If you count from the time the fertilized egg completes its implantation, then the time from the successful implantation of the fertilized egg to the birth of the child is about 256 days.