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Allan Jr.

By facebooker_1168687249831175

  • Fertilized egg

    Allan's egg is fertilized

  • 2 Cell stage

  • 4 cell stage

  • 8 cell stage

  • Compacted 8 cell

  • Morula

  • Blastocyst

  • ICM Growth

  • Blaminar Germ disk

  • Amniotic Cavity/yolk sac

    week 3 marker

  • Implantation complete

  • Extraembryonic mesoderm

  • Hypoblast cells replaced

  • Mesoderm Immigraion

    Week 4 marker

  • Ectoderm formation

  • Primariy neurulation

  • Secondary neurulation

  • neurulation complete

  • Embryonic folding

    Week 5 marker

  • Primitive gut tube forms

  • Major Blood vessels form

  • Upper limb bud forms

    week 6 marker

  • Lower limb bud forms

  • hand plate forms

    week 7 marker

  • Webbed fingers and toes

    week 8 marker

  • Fingers/toes separate

    week 9 marker

  • Gonads differentiate by sex

  • eyelids form

  • gonads differentiate by sex

    week 10 marker

  • eyelids form

    week 12 marker

  • iris develops

    week 14 marker

  • second trimester

    week 15 marker

  • Taste pores develop

    week 16 marker

  • fetus weighs about 100g

    week 18

  • vernix caseosa covers skin

    week 19 marker

  • larnugo replaced by vellus

    week 20

  • fetus weighs 500g

    week 23 marker

  • hpa axis established

    week 22 marker

  • 50% survival if born

    week 24 though 42 begins

  • Allan Jr. is born

    week 42