Do I have to exclusively breastfeed?
No. Lots of moms do a combination of breast and bottle feeding. Once breastfeeding is established mom can give the occasional bottle to have a break or work. She needs to pump however if she misses a feed to protect her milk supply.
How long do women breastfeed?
There is no right duration. Even getting colostrum (the first milk) into the baby is a benefit. Doctors recommended breastfeeding for two years with complimentary food. A child that breastfeeds for 9 months can go straight to homo milk without ever having formula.