If at the time of Nisheka (i.e. Adhana) the Sun is in a Movable Sign, delivery takes place in the 10th month, if he is in a Fixed Sign, delivery in 11th month is indicated and in a Dual Sign it is in 12th month. If a Movable Rasi ascends at Adhana, delivery takes place in 10th month, a Fixed 11th and Dual 12th....... by Kalyana Varma