The moment you've been waiting for is finally here! The average baby is about 51 cm (20 inches) long from head to toe and weighs approximately 3.4 kilograms (7.5 pounds) at birth. However, a healthy range for newborns is anywhere between 2.5 and 3.8 kilograms (5.5 and 8.4 pounds), so don't worry if your little one is a bit bigger or smaller. Expect your baby sometime this week, but remember that only about 5% of babies arrive on their exact due date. The maximum pregnancy period is considered to be 42 weeks, so try not to panic if your little one is taking their time. They're coming! Your baby’s immune system is still immature and relies on antibodies received from the placenta (and after birth, they'll continue to receive antibodies from your breast milk). Your baby is curled up tightly inside your uterus, all snug and cozy. Even after they're born, they'll likely maintain this curled-up position for a few weeks as they adjust to life outside the womb. The baby's crown-to-rump length is 37-38 cm (14.6-15 inches), and they weigh between 3400-3450 grams (7.5-7.6 pounds). Their total length (head to toe) is approximately 21.5 inches.