
新生儿知识竞答 Newborn Trivia
Chillchat (Learn Chinese and Chill)
00:00
When Do Babies Start Social Smiling?
The hosts ask when babies smile at others and report social smiling appears around one to two months.
Play episode from 07:49
Transcript

The hosts ask when babies smile at others and report social smiling appears around one to two months.