*Your itty bitty embryo has two layers of cells called the epiblast and the hypoblast. Soon they’ll develop into all of your baby’s body parts and systems.
*Guess what? If you're having twins, you may already be able to see them on an ultrasound this week.
*Before the placenta forms, you develop a yolk sac. This sac produces blood and helps to nourish your young embryo.
