Timeline of key stages: embryonic, foetal, neonatal development Flashcards
What period of weeks is considered embryonic development?
Weeks 1-8
What period of weeks is considered foetal development?
Weeks 8-birth
What period of weeks is considered neonatal development?
First 4 weeks (month) after birth
What are the 2 main processes in the first week of development?
Fertilisation
Implantation
On what day of development does fertilisation occur?
Day 1, Week 1
On what day of development does the morula form?
Day 4, week 1
On what day of development does the blastocyst form?
Day 5, week 1
Around what day of development does the trophoblast of the blastocyst form 2 layers?
Day 6.5, week 1
On what day of development does implantation of the blastocyst occur?
Day 6, week 1
On what day of development does formation of the bilaminar germ disc occur?
Day 8, week 2
On what day of development does formation of the amniotic cavity occur?
Day 8, week 2
On what day of development does formation of the primary yolk sac occur?
Day 8, week 2
In what week of development does the trilaminar germ disc form?
Week 3
In week 3, what 3 structures develop as well as the trilaminar germ disc?
Primitive streak, notochord, neural tube
In what weeks does somitogenesis occur?
Weeks 3-8
