Seemantha Samskara is performed in the 6th or 8th month of pregnancy, when the lord of the concerned month is strong in transit.
The Nakshatras, tithes, days and lagans as prescribed in the case of Pumsavanam hold good in the case of Seemantam also.
There is a controversy about the three pre-natal samskaras. Some people say that these are the “ Kshetra Samskaras” ( samskaras for reproductive system of female) and should be performed at the time of first pregnancy only. Some other people say that the three pre-natal samskaras are “ Garbha Samskaras” (samskaras of the child in the womb), and should be performed at the time of each pregnancy.