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Stages of Prenatal Development

Stages of Prenatal Development. Zygotic (germinal) stage Embryonic stage Fetal stage Critical period. Critical Periods in Fetal Development. PRENATAL DEVELOPMENT: Critical Periods. Zygotic Stage. Conception to 14 days Rapid Cell Division Process of Implantation.

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Stages of Prenatal Development

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  1. Stages of Prenatal Development • Zygotic (germinal) stage • Embryonic stage • Fetal stage • Critical period

  2. Critical Periods in Fetal Development

  3. PRENATAL DEVELOPMENT: Critical Periods

  4. Zygotic Stage • Conception to 14 days • Rapid Cell Division • Process of Implantation

  5. Day One

  6. Implantation

  7. Embryonic Stage • 2 weeks to 8 weeks • Cell division • Cell differentiation: Embryogenesis • Three layers of cell division • endoderm • mesoderm • ectoderm

  8. Embryonic Stage • Structures • Amniotic sac • Placenta • Umbilical cord

  9. One Month

  10. Five Weeks

  11. Fetal Stage • 8 weeks to birth • 3rd month: period of sexual emergence • 5th month: reflexes are present • Zone of viability: 24 weeks

  12. 18 Weeks

  13. Four Months

  14. 20 Weeks

  15. Fetal Stage • Vernix • Lanugo

  16. Fetal Behavior • States of arousal • Ability to learn

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