The hormones your wife is taking will not effect her hormone status after pregnancy.
Gestin or any progestational agent is not required at this stage of pregnancy and the babies growth should not be affected by stopping these tablets.
Male child is not affected by these tablets, it is the female child which could be adversely affected in terms of becoming a little more masculine and robust at birth.
Breech position of the baby is not due to the hormones she is taking. This position can change till the last day of pregnancy and the only thing to fear is there is an increase chance of caesarean delivery with breech persisting at term.