"The development of the child, while very rapid, is also very specific. The genetic pattern set down in the first day of life instructs the development of a specific anatomy. The ears are formed by seven weeks and are specific, and may resemble a family pattern. The lines in the hands start to be engraved by eight weeks and remain a distinctive feature of the individual. The primitive skeletal system has completely developed by the end of six weeks. This marks the end of the child’s embryonic (from Greek, to swell or teem within) period. From this point, the child will be called a fetus (Latin, young one or offspring). In the third month, the child becomes very active. By the end of the month he can kick his legs, turn his feet, curl and fan his toes, make a fist, move his thumb, bend his wrist, turn his head, squint, frown, open his mouth, press his lips tightly together. He can swallow and drinks the amniotic fluid that surrounds him. Thumb sucking is first noted at this age. The first respiratory motions move fluid in and out of his lungs with inhaling and exhaling respiratory movements."