Pregnancy is a mathematical probability that at least one in millions of spermatozoa in the male gonads will enter the egg of a woman who is ready for pregnancy. The spirit enters the baby's body five months after conception. During the first five months, the growth of the fetus is a purely biological activity. After five months, when the sex of the baby is well defined and the baby is moving, the period of the birth of a spirit-body duality begins. Thus, the pregnant woman has sufficient time to decide when to have an abortion for any reason.