Fetal development

Prenatal development

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  • Preimplantation Period

    Preimplantation Period

    Fertilization and implantation occur
  • Period: to

    Allison Craft- Prenatal Development

  • Week 2

    Week 2

    • The egg has grown to over 3 times its original size
    • development of the amniotic cavity and the chronic cavity
    • bilaminar germ disc
  • Week 3

    Week 3

    • The embryo is about the size of the head of a pin
    • Ectoderm form neural plate
    • Notochord formation
    • Development of the primordial cardiovascular system
  • Week 4

    Week 4

    • About the size of a poppy seed
    • digestive tract splits into 3 sections
    • frontonasal process
    • brain development
    • face and neck formation
  • Week 5

    Week 5

    • About the size of a sesame seed
    • Heart is starting to divide into chambers
    • Primary palate is forming
  • Week 6

    Week 6

    • Upper lip is formed
    • Secondary palate is formed
    • Nasal cavity
    • arms and legs are budding
    • Heart is beating twice as fast as ours
  • Week 7

    Week 7

    • Tooth development begins
    • Liver and appendix
  • Week 8

    Week 8

    • baby is about the size of a raspberry
    • breathing tubes stretch from the throat to the developing lungs
    • dental lamina begins the stage of tooth development