What are the developmental milestones for a 2-month-old baby?

Developmental milestones for a 2-month-old baby generally include: 1. Physical growth—each infant grows at a different rate, but typically, by two months of age, a baby's weight should have increased by approximately 1.5 to 2 kilograms compared to birth weight, and length by about 3–5 centimeters. Head circumference also increases accordingly. 2. A 2-month-old baby can lift and slightly turn their head; when placed on their stomach over the mother's abdomen, they can raise their head slightly. 3. The baby's vision gradually improves, allowing them to focus on objects about 20–30 centimeters away. They show interest in bright colors and complex patterns.