Measuring your baby from top to toe with his legs extended, he is about 14 inches/ 35.6 centimeters. He weighs a little more than 1.6 pounds/ 760 grams. Your baby's eyes begin to open around now. Response to sound grows more consistent toward the end of the seventh month, when the network of nerves to the ear is complete. He also continues to take small breaths and although he's only breathing in water and not air, it's still good practice for when he's born.