Maybe they are just selfish and only care about their figure. In my Country, Women are proud to say that they breast-feed their child.
It has all the nutrients a newborn child needs and will make the baby strong against sickness.
Some mothers do this for a month then they turn to formula milk. To supply more if the doctors persist.
We even have sections in the mall where they can breast-feed their babies. And every year in Manila, the largest number of breast-feeding mothers participate for the world-record.