Browse A-Z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9 Fetus at 12 weeks Back Fetus at 12 weeks A fetus at 12 weeks can make a fist and suck its thumb. A.D.A.M. content is best viewed in IE9 or above, Firefox and Google Chrome browser. Content is best viewed in IE9 or above, Firefox and Google Chrome browser.
