When the Lagna and the Moon are in odd (masculine) signs aspected by male planets, pronounce the birth of a male child; when in even (feminine) signs aspected by female planets, announce a daughter.
Verse 3 — Determining the Exact Duration of Gestation and Delivery Timing
चन्द्रोपगतनवांशेशदशामानेन वा तथा ।
प्रसवो जायते पुंसां मासानां गणनाद्विजाः ॥ ३॥
The time of delivery for human beings is derived through the navamsha occupied by the Moon and the planetary lords governing each month of pregnancy, bringing the delivery to fruition in the tenth solar month.