Q. Can a mother breast feed and fast, is it allowed?
A. Yes, it is permissible for a mother to breastfeed and fast. However, the shariah has given her the allowance to delay her fast and make it up afterwards, if she fears harm upon herself or the baby while breastfeeding.
And Allah knows best.
Mufti Waseem Khan
This answer was collected from DarulUloomTT.net, which is operated under the supervision of Mufti Waseem Khan from Darul Uloom Trinidad and Tobago.