Calcium intake

Jerelly • A 24 years old newly wed wife.
My sis in law do take calcium pill daily when she's pregnant. Her doc dont recommend her to drink milk. Sayin that will cause her hard to labour cuz baby will be bigger in size. Yes her baby indeed smaller compare to other babies and healthy. But, it is enough? Just calcium pill without the milk? Do we really need milk? (Im lactose intolerant and hate the taste of milk)