Ang normal weight ng 2-month-old ay usually between 4-6 kg, so ang baby mo ay nasa magandang range talaga! Pero best pa rin na i-confirm sa pediatrician mo during check-up kasi bawat baby ay different, yung growth chart nila ang best reference, especially kung consistent ang weight gain from birth. A few of us moms use the growth monitoring card from the health center to track, kaya if hindi ka pa nag-check, maybe visit your pediatrician or barangay health center para sure na lahat okay with baby's development.