in Berakoth 60a it says
Within the first three days a man should pray that the seed should not putrefy; from the third to the fortieth day he should pray that the child should be a male; from the fortieth day to three months he should pray that it should not be a sandal; from three months to six months he should pray that it should not be still-born; from six months to nine months he should pray for a safe delivery.
do jew have a custom to pray this prayer? (is it printed? what groups of jews do it?),
or this is just theory?