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month 1
size of a pin needle
egg attaches to lining of uterus
stage for brain and spinal cord development
internal organs and circulatory system begin to form
the heart begins to beat -
Period: to
9 month to month
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month 2
about 1/4 inch
face, eyes, ears, and limbs take shape
bones begin to form -
month 3
1 inch
nostrils, mouth, lips, teeth buds, and eyelids form
Fingers and toes almost complete
all organs present, although immature -
month 4
3 inchs, about 1 ounce
can suck its thumb, swallow, hiccup, move around a lot
facial features becomes clearer -
month 5
6 1/2 - 7 inches, 4-5 ounces
hair, eyelashes, and eyebrows appear
teeth continue to develop
organs are maturing
becomes more active -
Month 6
8-10 inches and 8-12 ounces
fat deposits under skin, but fetus appears wrinkled
breathing movements begin. -
month 7
10-12 inches, 1 1/2 - 2 pounds
periods of activity followed by periods of rest and quiet -
month 8
14-16 inches and 2 1/2-3 pounds
weight gain con. rapidly
may react to loud noises with a reflew jerking action
moves into a head-down postion -
month 9
17-18 inches and 5-6 pounds
weight con. until the week before birth
skin becomes smooth as fat deposits con.
movements decrease as the fetus has less room to move around.
acquires disease-fighting antibodies from mother's blood
descend into pelvis, ready for birth