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Fetal Development

Fetal Development. Month by Month Revised 10/15/10 KBrown. First Month. By the end of the two weeks, the zygote is about the size of a pin head The heart, no larger than a poppy seed , has begun beating Zygote has implanted itself to the lining of the uterus and becomes an embryo.

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Fetal Development

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  1. Fetal Development Month by Month Revised 10/15/10 KBrown

  2. First Month • By the end of the two weeks, the zygote is about the size of a pin head • The heart, no larger than a poppy seed, has begun beating • Zygote has implanted itself to the lining of the uterus and becomes an embryo

  3. First Month

  4. Two Months • The embryo is about 1/4 inch long at beginning of the month and has distinct, slightly webbed fingers. • Bones begin to form • Face, eyes, ears, and limbs have developed • Veins are clearly visible; heart has divided into right and left chambers • Changes into a fetus at the end of eight weeks

  5. Two Months

  6. Three Months • Fetus is 1 inch long at the beginning of month • Nostrils, mouth, lips, teeth buds, and eyelids form. • Fingers and toes are almost completely developed. • All organs are present, although immature

  7. Four Months • Beginning of the month size: about 3 inches long; weighs 1 ounce • Can suck thumb, swallow, hiccup, and move around • Covered with a layer of thick, downy hair called lanugo • The heartbeat can be heard clearly • Facial features become clearer

  8. 4 months

  9. Five Months • Fetus is 6 ½-7 inches long and weighs almost 4-5 ounces • Hair, eyelashes, and eyebrows appear. • Teeth continue to develop • Organs are maturing. • Becomes more active.

  10. Six Months • Length: 8-10 inches long; weight: 8-12 ounces • Baby's lungs are filled with amniotic fluid; he/she has started breathing motions • A protective coating called vernix caseosa begins to form on baby's skin. • If the mother talks or sings, the baby can hear her.

  11. 6 Months

  12. Seven Months • Beginning of the seventh month, the baby weighs about 1 ½ to 2 pounds and is about 14-16 inches long • The body is well-formed • Periods of activity are followed by periods of rest and quiet. • Fingernails cover his fingertips

  13. Eight Months • Size: 14-16” long, weighs about 2 ½ to 3 pounds. • Weight gain continues rapidly • Baby is gaining about half a pound per week, and layers of fat are developing • May react to loud noises with a reflex jerking, • Moves into a head-down position

  14. 8 months

  15. Nine Months • Fetus is 5 to 6 pounds and 17 to 18 inches long as month begins. • Weight gain continues until week before birth • Skin becomes smooth as fat deposits continue • Movements decrease as the fetus has less room • Acquires antibodies to fight disease from the mother’s blood • Moves into pelvis, ready for birth.

  16. Summary Be able to discuss at least one important fact from each month.

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