Fetal Development1

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Sri Marasi Aritonang

Fetal Development


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Objectives

After 30 minutes of learning activities, we candevelop our knowledge about fetal development


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1 Month First Trimester

At the end of four weeks:

Baby is 1/4 inch in length

Heart, digestive system,backbone and spinal cord

begin to form Placenta (sometimes called

"afterbirth") begins todevelop

The single fertilized egg isnow 10,000 times larger thansize at conception


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Month 2 First Trimester

At the end of 8 weeks:

Baby is 1-1/8 inches long

Heart is functioning

Eyes, nose, lips, tongue,

ears and teeth are forming Penis begins to appear in

boys

Baby is moving, although themother can not yet feel

movement


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Month 3 First Trimester

At the end of 12 weeks:

Baby is 2 1/2 to 3 inches long

Weight is about 1/2 to 1 ounce

Baby develops recognizable form.Nails start to develop and earlobesare formed

Arms, hands, fingers, legs, feet andtoes are fully formed

Eyes are almost fully developed

Baby has developed most of his/herorgans and tissues

Baby's heart rate can be heard at 10weeks with a special instrument

called a Doppler


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Month 4

Second TrimesterAt the end of 4 months:


Weight is about 6 to 7 ounces

Baby is developing reflexes, such assucking and swallowing and maybegin sucking his/her thumb

Tooth buds are developing Sweat glands are forming on palms

and soles

Fingers and toes are well defined

Sex is identifiable

Skin is bright pink, transparent and

covered with soft, downy hair Although recognizably human in

appearance, the baby would not beable to survive outside the mother'sbody


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Month 5 Second Trimester

At the end of 5 months:

Baby is 8 to 10 inches long

Weight is about 1 pound

Hair begins to grow on baby'shead

Soft woolly hair called lanugowill cover its body. Some mayremain until a week after birth,when it is shed.

Mother begins to feel fetalmovement

Internal organs are maturing

Eyebrows, eyelids andeyelashes appear


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Month 6

Second TrimesterAt the end of 6 months:


Weight is about 1 3/4 to 2pounds

Eyelids begin to part andeyes open sometimes forshort periods of time

Skin is covered withprotective coating calledvernix

Baby is able to hiccup


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Month 7

Third TrimesterAt the end of 7 months:


Weight is about 2 1/2 to 3 1/2pounds

Taste buds have developed

Fat layers are forming Organs are maturing

Skin is still wrinkled and red

If born at this time, baby will beconsidered a premature babyand require special care


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Month 8



Weight is about 4 to 6 pounds

Overall growth is rapid this month

Tremendous brain growth occurs atthis time

Most body organs are nowdeveloped with the exception of thelungs

Movements or "kicks" are strongenough to be visible from theoutside

Kidneys are mature

Skin is less wrinkled

Fingernails now extend beyondfingertips


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Month 9



Weight is about 7 to 7 1/2pounds

The lungs are mature

Baby is now fully developedand can survive outside themother's body

Skin is pink and smooth

Baby settles down lower in

the abdomen in preparationfor birth and may seem lessactive

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Fetal Development1