Fetus

Embryology

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Embryology, Embryo Organ Development

  • Physiology
  • Spinal Cord development (Peripheral nervous system)
  1. Differentiation: 3-4 weeks
  2. Completely forms: 20 weeks
  • Physiology
  • Brain development (Central nervous system)
  1. Differentiation: 3 weeks
  2. Completely forms: 28 weeks
  3. Brain Teratogen susceptibility
    1. Highly Sensitive: 3-5 weeks
    2. Less Sensitive: 6-38 weeks
  • Physiology
  • Eye development
  1. Differentiation: 3 weeks
  2. Completely forms: 20-24 weeks
  3. Eye Teratogen susceptibility
    1. Highly Sensitive: 4-8 weeks
    2. Less Sensitive: 8-38 weeks
  • Physiology
  • Olfactory system development
  1. Differentiation: 4-5 weeks
  2. Completely forms: 8 weeks
  • Physiology
  • Auditory system development
  1. Differentiation: 3-4 weeks
  2. Completely forms: 24-28 weeks
  3. Ear Teratogen susceptibility
    1. Highly Sensitive: 4-9 weeks
    2. Less Sensitive: 9-12 weeks
  • Physiology
  • Respiratory Tract Development
  1. Differentiation: 5 weeks
  2. Completely forms: 24-28 weeks
  • Physiology
  • Heart Development
  1. Differentiation: 3 weeks
  2. Completely forms: 6 weeks
  3. Heart Teratogen susceptibility
    1. Highly Sensitive: 3-6 weeks
    2. Less Sensitive: 6-8 weeks
  • Physiology
  • Gastrointestinal tract development
  1. Differentiation: 3 weeks
  2. Completely forms: 24 weeks
  • Physiology
  • Renal development
  1. Differentiation: 4-5 weeks
  2. Completely forms: 12 weeks
  • Physiology
  • Genital development
  1. Differentiation: 5 weeks
  2. Completely forms: 7 weeks
  3. External Genitalia Teratogen susceptibility
    1. Highly Sensitive: 7-9 weeks
    2. Less Sensitive: 10-38 weeks
  • Physiology
  • Face Development
  1. Differentiation: 3-4 weeks
  2. Completely forms: 8 weeks
  3. Lips Teratogen susceptibility
    1. Highly Sensitive: 5-6 weeks
    2. Less Sensitive: 6 weeks
  4. Teeth Teratogen susceptibility
    1. Highly Sensitive: 6-8 weeks
    2. Less Sensitive: 9-20 weeks
  5. Palate Teratogen susceptibility
    1. Highly Sensitive: 6-8 weeks
    2. Less Sensitive: 9 weeks
  • Physiology
  • Limb Development
  1. Differentiation: 4-5 weeks
  2. Completely forms: 8 weeks
  3. Arms Teratogen susceptibility
    1. Highly Sensitive: 4-7 weeks
    2. Less Sensitive: 8 weeks
  4. Legs Teratogen susceptibility
    1. Highly Sensitive: 4-8 weeks
    2. Less Sensitive: 8-9 weeks