It is basically impossible for a man and a woman to get pregnant when they sleep naked together. For a woman to become pregnant, a successful pregnancy will occur only if the male sperm enters the woman’s vagina and happens to do so during the woman’s ovulation period, and if the sperm and egg can successfully combine and then form a fertilized egg that will return to the uterine cavity and take up residence. If any of these links fail, the pregnancy may fail. Therefore, simply lying naked in a bed where the sperm and egg have no chance to unite and the likelihood of pregnancy is almost zero, will not lead to pregnancy.