In Surah Baqarah Allah says:
Mothers may breastfeed their children two complete years for whoever wishes to complete the nursing [period]. Upon the father is the mothers' provision and their clothing according to what is acceptable. No person is charged with more than his capacity. No mother should be harmed through her child, and no father through his child. And upon the [father's] heir is [a duty] like that [of the father]. And if they both desire weaning through mutual consent from both of them and consultation, there is no blame upon either of them. And if you wish to have your children nursed by a substitute, there is no blame upon you as long as you give payment according to what is acceptable. And fear Allah and know that Allah is Seeing of what you do.
But with the rise of powdered infant milk, I have seen any mothers putting their babies on the bottle, not for any medical reason but just for the sake of vanity.
Besides the fact that the child isn't getting natural nutrients through milk from it's mother or foster-mother (as in the case of Prophet Muhammad), what view does the Islamic Shariah hold?
Can a mother forego her duty to breastfeed her baby without any valid medical reason? Is breastfeeding optional in Islam?