READ MORE 1st week Right now your baby has not even formed yet. Right now your baby is a small egg hidden inside your ovaries. On the 14th day after the first day... READ MORE 2nd week Most of the time your baby implants in your womb and grows quite well. During implantation your baby anchors itself to the womb to get nutrients to grow. READ MORE 3rd week Your baby is a flat disk of cells enclosed in a shell made up of cells. The outer shell develops into the placenta. The shell envelops three cavities.. READ MORE 4th week By this time your baby looks like a flat flower petal. It consists of three cell layers. They are, the topmost layer (ectoderm), middle layer..