Pumsavanam is the samskara performed with the objective of getting male progeny and preventing abortions. Generally it ia performed in the 2nd or 3rd month of the pregnancy.
a) Lord of the month of pregnancy: The lord of the month of pregnancy should be strong in transit.
1st month Venus
2nd month Mars
3rd month Jupiter
4th month Sun
5th month Moon
6th month Saturn
7th month Mercury
8th month Lord of the conception lagna
9th month Moon
10th month Sun
During the time of pregnancy the concerned month lord should be strong in transit.
b) Naksatras: Mrigasira, Pushyami, Moola, Sravana, Punarvasu, Hasta and all fixed nakshatras (Uttara triam and Rohini) are good.
c) Tithis: 1,2,3,5,7,10,11 and 13 tithis of both pakshas are good.
d) Days: Male days, i.e., Sunday, Tuesday and Thursday are good.
e) Lagna: Lagnas and Navamsa lagans of male signs (odd signs) with benefics in kendras and trikonas and malefics in 3,6,11 houses are auspicious.