17 May Baby Milestones – Web MD By Dr. Tanya In Infants (4 to 12 months) Is your baby 4 to 7 months old? Watch Dr. Tanya’s video on Web MD about your baby’s growth and development from 4 to 7 months of age. Tags:Baby MilestonesDr. TanyaGrowth and DevelopmentinfantsPediatricsVideoWeb MD Share: Dr. Tanya