The baby now enters it's fetal period. The average size is approximately 27-35 mm crown to rump length (CRL), or 1.06-1.38 inches. S/he weighs in at 4 grams, or 4 paper clips. Tiny toes have formed. The eyes are largely open, but the eyelids are beginning to fuse, and will stay that way until 25-27 weeks. External genitalia is beginning to differentiate. External ears are completely formed, as well as the upper lip. The biggest accomplishment this week is the disappearance of the tail!
Photo © A.D.A.M. in Fetal Development