Pucker up, you’re in the citrus phase! Your little lemon is about 3-and-a-half inches long and—how’s this for cute—he’s peeing! And sprouting hair! While urine, a key ingredient to the cocktail of amniotic fluid that protects the fetus, fills the amniotic sack, a layer of lanugo, or fine baby fuzz, begins to cover her body. The adorableness continues as your baby begins to squint, frown, grimace and suck his thumb—practicing for those times you’ll say no to a lollipop.