Prenatal Development Ectoderm
THE COURSE OF PRENATAL DEVELOPMENT
→
Prenatal Development ➢ →
germinal
embryonic fetal Amnion
Germinal Period
→
➢ Differentiation Umbilical Cord
→
Blastocyst
→
Placenta
Trophoblast →
➢ Implantation
➢ Organogenesis
Embryonic Period
→
➢ →
→
→ 3rd week →
→ 21 days
Endoderm
→ 24 days
→ → 4th week
Mesoderm
→ 5th - 8th week
→
, → 8th weeks
Fetal Period
➢ 13 weeks
→
→
→
➢ 17 weeks
➢ 22 weeks
→ Brain Development
➢ 26 weeks ➢
→ ➢ First two trimesters
3rd trimester & first 2 years of
➢ 24-25 weeks postnatal life
viability
→ ➢
➢ 29 weeks Neural Tube
➢ Last two months
→
Trimesters
→ →
➢
Neurogenesis →
→
→
THE COURSE OF PRENATAL DEVELOPMENT
→
Prenatal Development ➢ →
germinal
embryonic fetal Amnion
Germinal Period
→
➢ Differentiation Umbilical Cord
→
Blastocyst
→
Placenta
Trophoblast →
➢ Implantation
➢ Organogenesis
Embryonic Period
→
➢ →
→
→ 3rd week →
→ 21 days
Endoderm
→ 24 days
→ → 4th week
Mesoderm
→ 5th - 8th week
→
, → 8th weeks
Fetal Period
➢ 13 weeks
→
→
→
➢ 17 weeks
➢ 22 weeks
→ Brain Development
➢ 26 weeks ➢
→ ➢ First two trimesters
3rd trimester & first 2 years of
➢ 24-25 weeks postnatal life
viability
→ ➢
➢ 29 weeks Neural Tube
➢ Last two months
→
Trimesters
→ →
➢
Neurogenesis →
→
→
