my baby is 2and a half month old .her height and weight is normal but neck is little bit week .she cannot hold her neck properly please tell me when she hold her neck properly

A. When your baby is between 1 and 3 months old, she'll be gradually gaining the strength needed to hold her head up. By around 2 months, while she's lying on her stomach, you might notice she can raise her head for just a few seconds at a time. These brief moments help strengthen the muscles in the back of her neck.