Milestone: This is a developmental milestone. Most babies smile responsively eg at someone, between 6-8 weeks of age
Answered 1/4/2017
842 views
3 doctors weighed in across 2 answers
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question