Fertilized eggs planted in endometrium of mothers of this \"fertile soil\" on the first month, from the standpoint of modern embryology, cleavage, mesoderm and limb section stage, its amazing growth speed of, to the first month, embryonic growth of nearly 10,000 times times the volume of roughly had about 1 cm long. When the mother\'s blood was in a small life slowly flow in blood vessels, heart has form and begin the work.
When baby grow up to two months, has up to 2-3 cm in length, forming the head and body, facial features are clearly visible, all of the organ primordia has taken shape, body covered with a thin layer of skin, hands and feet can also see the texture to; in short, gives people have basically all the qualities he possesses. When the embryo not only has produced morphological changes, but also to feel the stimulus from the outside world, pregnant women must not think that pregnant soon fetus has not been formed and lightly.
The third month, prototype of the fetus already have. End of the third month is known as the \"embryonic Bud\" but real \"fetus\". Fetus is absorbed through the skin of oxygen and nutrition before, now through the placenta and umbilical cord on, since the parent access to rich nutrients. During this period, about physical growth of about 1 cm per day. Late in the third month, fetuses have up to 9 cm. Face has a human embryo, eyelids, ears also has formed, lip structure complete, uplift the nose and nostrils. Sex organs began in the late 11th week. When the fetus will turn your head, also change the direction or position of the body, will have actions such as walking, jumping, and scared, is very active in the amniotic fluid movement.
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