Baby, at 3 months old, gains in flexibility and loves to chirp! He continues to gain weight and inches and is more and more aware of the world around him. During this third month, pay particular attention to preparing your return to work. Growth, awakening, and development of a 3-month-old baby Your little boy, at 3 months old, weighs about 5.75 kilos and measures about 59.9 cm Your little girl, at 32 months old, weighs about 5.35 kilos and measures about 58.6 cm Baby's head circumference has grown by about one and a half centimeters to 40 cm...