prenatal development (conception – birth)
DESCRIPTION
PRENATAL DEVELOPMENT (Conception – Birth). First Month. Fertilisation occurs Zygote plants itself in the lining of the uterus Rapid cell division occurs Embryonic stage lasts from 2 weeks to 8 weeks. CONCEPTION. First Month. Nervous system begins to develop - PowerPoint PPT PresentationTRANSCRIPT
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PRENATAL DEVELOPMENT
(Conception – Birth)
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First Month• Fertilisation occurs• Zygote plants itself in
the lining of the uterus• Rapid cell division
occurs• Embryonic stage lasts
from 2 weeks to 8 weeks
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CONCEPTION
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First Month• Nervous system begins
to develop• By the end of the first
month, the embryo is up to approx ½ an inch long.
• The heart, which is no larger than a poppy seed, has begun beating.
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First Month
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Two Months• The heart has divided into
right and left chambers and blood vessels form
• Head area develops rapidly• Eyes begin to form detail• Internal organs grow,
especially the digestive system
• Sex organs develop rapidly and gender is distinguished
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Two Months
• Arms and legs form and grow
• Weighs 1/10 ounce• The embryo is about 1
inch long and has distinct, slightly webbed fingers.
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Two Months
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Three Months• By now the fetus is 2 1/2
to 3 inches long and is fully formed.
• weighs 1 ounce or 28 grams
• Has begun swallowing and kicking.
• All organs and muscles have formed and are beginning to function.
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Three Months• Head growth occurs
rapidly• Bone formation begins to
grow rapidly• The digestive organs begin
to function• Arms, legs and fingers
make spontaneous movements
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Four Months• Lower parts of the body
show rapid growth• Bones are distinct in X-
Rays• Reflex movement
becomes more active• Heartbeat detected by
physician• Sex organs are fully
formed
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Four Months• Foetus is 7 inches long • Weighs 5 ounces or 142
grams• Is covered with a layer of
thick, downy hair called lanugo.
• This is when you may feel a first kick.
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4 months
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Five Months
• A protective coating called
vernix caseosa begins to form on baby's skin.
• By the end of this month, the baby will be nearly 8 inches long
• Weighs almost a pound or 454 grams.
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Five Months• Ears and nose begin to
develop cartilage• Fingernails and toenails
begin to grow• Foetus performs thumb
sucking, kicking and hiccups
• Foetus is 14 inches long or 35 cm.
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Six Months
• Eyebrows and eyelids are visible.
• Lungs are filled with amniotic fluid, and has started breathing motions.
• If you talk or sing, the baby can hear you.
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Six Months
• Fat is developed under the skin.
• Weighs 2 pounds or approximately 900 grams.
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6 Months
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Seven Months
• By the end of the seventh month, your baby weighs about 3 1/2 pounds.
• The body is well-formed.
• Fingernails cover the fingertips.
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Seven Months
• Foetus is 17 inches or 42 cm long.
• Weighs 5 pounds or approximately 2 kg.
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Eight Months• The baby is gaining
about half a pound per week
• Layers of fat are piling on.
• The baby has probably turned head-down in preparation for birth.
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Eight Months• Weighs between 4 and
6 pounds.
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Nine Months
• The baby is a hefty 6 to 9 pounds
• Measures between 19 and 22 inches.
• As the baby becomes more crowded, it may move around less.