Conception chart

Background
The Conception chart has its origins in Thirteenth century China. It purports to be able to tell an expectant couple the gender of the fetus they conceived. It's accuracy has not been confirmed by the scientific method. 

In astrology Natal chart is the map of sky at the date and time of birth. By using this Natal chart there is a way to plot the Conception chart. Conception chart is the map of sky at the date and time when that native was conceived. There are laws to calculate the pregnancy period using the phase of moon and the ascendant and the Moon's position in the Natal Chart.