delivered my 2nd son with 1729g only on my 39th w. as per specialist there are 3 causes why baby is small, mine is because it is genetic. nevertheless, by God's grace baby is very healthy. my OB and i ensured that we monitored baby's progress while inside my tummy with weekly ultrasound and taken the meds as prescribed. now, baby passed his 1 month and is improving well. and oh, my eldest son is 2450g only and healthy as well.
I suggest, do not worry too much especially if baby is healthy. worrying will not help, instead, obey your ob and leave the uncontrollable to God. Take care and God bless♥️
Magbasa pa