10 Weeks: prune

This week marks the beginning of the fetal period, which lasts until birth. Your baby's body systems, such as circulatory, nervous, reproductive and digestive, are fully formed during this time. His heart is beating approximately 160-170 beats per minute. Your baby is 1.06 - 1.38 inches with 1/2 the length being attributed to the head. He weighs about 4 paper clips.

Your baby will become much more active than before, but unfortunately, his movements are still too small for you to notice. He will be moving his arms and legs, which can be seen on an ultrasound. Your baby's joints are fully formed, as are his tiny hands, feet, fingers and toes. At this age, he would be able to grab an object, if it were placed in his hand, as he grows more and more sensitive to touch. Your baby's eyes are open most of the time but the eyelids are beginning to fuse - they will stay that way until you reach approximately 25 to 27 weeks. The external genitalia are beginning to show your baby's gender and both the external ears and upper lip are completely formed now. Your baby's biggest accomplishment this week is the disappearance of the tail!

Also, your baby is breathing. This breathing activity is noticeable as he "breathes" amniotic fluid. He is beginning to urinate as well. He’s busy swallowing and kicking. Each day more minute details start to appear, such as fingernails and peach-fuzzy hair.