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PRENATAL DEVELOPMENT (Conception – Birth)

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

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PRENATAL DEVELOPMENT (Conception – Birth)

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  1. PRENATAL DEVELOPMENT (Conception – Birth)

  2. 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

  3. CONCEPTION

  4. First Month • Nervous system begins to develop • By the end of the first month, the embryo is up toapprox ½ an inch long. • The heart, which is no larger than a poppy seed, has begun beating.

  5. First Month

  6. 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

  7. 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.

  8. Two Months

  9. 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.

  10. 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

  11. 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

  12. 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.

  13. 4 months

  14. Five Months • A protective coating called vernixcaseosa 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.

  15. 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.

  16. 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.

  17. Six Months • Fat is developed under the skin. • Weighs 2 pounds or approximately 900 grams.

  18. 6 Months

  19. Seven Months • By the end of the seventh month, your baby weighs about 3 1/2 pounds. • The body is well-formed. • Fingernailscover the fingertips.

  20. Seven Months • Foetus is 17 inches or 42 cm long. • Weighs 5 poundsor approximately 2 kg.

  21. 7 Months

  22. 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.

  23. Eight Months • Weighs between 4 and 6 pounds.

  24. 8 months

  25. 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.

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