A one-month-old baby's average weight varies slightly by gender but generally falls within these ranges:
- For baby boys, the average weight is about 4.4 kg (9.7 lbs) according to UK data, and around 4.5 kg (9.9 lbs) according to other sources
- For baby girls, the average weight is about 4.2 kg (9.2 lbs) to 4.5 kg (9.9 lbs)
Babies typically gain about 1.5 to 2 pounds (around 0.7 to 0.9 kg) in the first month after birth
. It's important to note that weight ranges are broad because every baby grows at their own pace, and factors like genetics, feeding method, and overall health influence weight gain
. Pediatricians focus on steady weight gain along the growth percentile charts rather than a specific number. If a baby is growing steadily and following their growth curve, their weight is generally considered healthy
. In summary, a healthy one-month-old baby usually weighs between approximately 4.2 to 4.5 kg (9.2 to 9.9 lbs), with boys tending to be slightly heavier than girls on average
