My daughter's pediatrician has prescribed her multivitamin 1ml apart from vitamin d and iron drops. She is almost 4.75 kg.Should I give her multivitamin too? Also , she is little late while achieving her monthly milestones.According to doctor it's because she was born 1 month earlier with low weight of 2kg. Otherwise she is perfectly active baby. Should I give her multivitamin also? And achieving monthly milestones little late is normal?