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nothing has happened so far
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conception happens, rapid cell division begins, it travels down the Fallopian tube, becomes an embryo
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neural tube closes; brain and spinal cord will form
heart, organs and bones start to form
develop head and trunk, arm and leg limb buds appear
Brain begins development
eyes and ears begin to form, heart conditions to develop, and beats a regular rhythm
Baby is 1/6th inches long -
baby begins growing and taking shape
lungs begin to form
four chamber heart -
head is half the size of the baby
all body parts are present
eyes, ears, arms and legs are identifiable
baby is 1/4 inches long -
genitals develop
teeth buds form
about 2 inches in length, weighs about 1/3 ounce -
fingernails grow
face has a more defined profile
intestines are in the abdomen
baby is 2 1/2 inches in length
weights about 1/2 ounces -
Baby's sex will become apparent
baby can swallow and make urine
about 3 1/2 inches in length and weighs about 1 1/2 ounces -
baby is moving but mom cannot feel it
baby is about 4 1/2 inches and weights about 4 ounces -
baby begins to hear
digestive system begins to work
vernix caseosa covers baby -
regular sleep and wake pattern
all organ and structure formed
breathing movements occur but are underdeveloped
covered and lanugo
may begin to suck thumb
about 6 1/3 inches and about 11 ounces -
grows nails, fingerprints, eyebrows, lashes, hair
more active
hearbeat
lowest limit of viability
baby is about 7 1/2 inches, about 1 pound -
baby has wrinkly skin, it is translucent
lung development
regular sleep and wake patterns
8 inches in length, 1 1/3 pounds -
eyes begin to partially open and close
baby begins to kick
lungs are capable of breathing air -
finishes most major development
rapid weight gain
lanugo starts to fall off
baby is about 11 inches in length and weighs about 3 3/4 pounds -
grows fingernails and toenails fully
develops breathing motion
responds to light
skin is pink and smooth
about 12 inches in length and weighs about 4 1/2 pounds -
takes up most of the amniotic sac
starts to turn head down
about 13 1/2 inches in length and weighs about 6 pounds
will continue to gain about 1/2 pound a week until delivery -
brain, lungs, liver develop
brain will double in size between 35 and 39 weeks
lung development
week 39=full term
weight gain helps the mother