Can 4 months old baby sit with support?
Babies develop at their own rate, but yes, a 4 month old may be
able to sit with support. My 4.5 month old has learned to sit for
short periods of time without support.
I don't find this answer to be credible. Most babies do not sit
on their own until 6-7 months of age. My son held his own neck up
at only 2 days old and sat up on a boppy at 3 months old for 10 to
20 seconds at a time, but they fall left or right. At six months
they learn to hold their toes or an object between their legs which
keeps them balanced. Every baby does things at their own rate but a
four month sitting up all by themselves is quite unbelievable.