Baby Gender Calculator Program calculates periods with increased probability of conceiving male or female child, based on recalculated date of birth of childs parents. This method is the result of a few-decade experience of nursery personnel, and is not known as scientifically based procedure. Nature regulated in different ways that roughly equal number of girls and boys come to this world. In this theory, one of those ways is creation of some kind of inner biological clock in every man, which begins to clock on the day of mans own conceiving.