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embryo has a circulatory system
first
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head and nervouse system formation
first
-
-
hands and feet form and a thin layer of skin
first
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embryo becomes fetus
first
-
10 cm (4in.) 19 grams (2/3 oz.
first
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fetus begins to move and can be felt by the mother
second
-
-
hair and fingernails develope
second
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period of rapid growth
second
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eyelashes develope
second
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fetus kicks, cries, hiccups, and can hear sounds
second
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finger and toes prints are visible
second
-
digestive system and respiratory system completed
third
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calcium is need for bone and tooth development
thrid
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in the male, the testes lower into scrotum
third
-
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40 weeks (nine months) able to live on its own
third
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average size 7.5 pounds
third
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fetus may suck its thub, responds to stimuli, including pain and light
third
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placental function and volume of amniotic fluid diminishes
third
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