Baby: Can start from the very beginning, where they have their startle (Moro) reflex. Doesn't have to be to all sounds and reacting all the time.
Answered 8/23/2020
3.4k views
Immediately: Studies show a preference for mothers voice by age 3 hours and dads by the end of the day. These are often a subtle like the flicker of an eyelid.
Answered 11/27/2017
1.9k views
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A doctor has provided 1 answer
3 doctors weighed in across 2 answers
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