pregnancy One Month Your baby is an embryo consisting of two layers of cells from which all her organs and body parts will develop. 4 weeks 5 weeks 6 weeks 7 weeks Two Months Your baby is now about the size of a kidney bean and is constantly moving. He has distinct, slightly webbed fingers. 8 weeks 9 weeks 10 weeks 11 weeks 12 weeks Three Months By now your baby is about 3 inches long and weighs nearly an ounce. Her tiny, unique fingerprints are now in place. 13 weeks 14 weeks 15 weeks 16 weeks Four Months Your baby is now about 5 inches long and weighs 5 ounces. His skeleton is starting to harden from rubbery cartilage to bone. 17 weeks 18 weeks 19 weeks 20 weeks Five Months Eyebrows and eyelids are now in place. Your baby would now be more than 10 inches long if you stretched out her legs. 21 weeks 22 weeks 23 weeks 24 weeks Six Months Your baby weighs about a pound and a half. His wrinkled skin is starting