Is there a growth spurt at 4 months?
Score: 4.6/5 (25 votes) By 4 months old most babies will have doubled their birth weight, according to Dr. Cristy Wong. The 3- or 4-month growth spurt can come on fast, is likely to be the biggest of the first year, and will cause your baby to be cranky, sleepy, and hungry, just like the first coupl...