Conception To Early Days Timeline Flashcards
Embryo for weeks?
2-8
When classed as fetus?
9- birth
Implantation
Week 2-3
Gastrulation
Day 15
What does ectoderm become?
Skin/hair/nails/Nervous System
What does Mesoderm become?
Muscle/bones/connective tissue/blood vessels/urogenital glands
Endoderm
Lining of digestive/respiratory/urinary systems Liver/pancreas
Notochord
Day 20
Folded embryo
Day 25
Heart starts beating
Day 22
Neural tube closes
Day 26
What mediates neurulation
Folic acid
When is folic acid advised to be taken
3 months before trying to conceive
Liver, gall bladder pancreas
Week 5
Kidneys functional
Week 9
(Essential for amniotic fluid)
Intestine rotates to final shape
Abdominal wall closes
Week 10
Functional placenta
Week 10
Lip and palate are fused
Week 10
Breathing/movement/digits
Week 11
External genitals fully formed
Week 12
Sucking movement
Week 13
Urinate
Week 15
Surfactant production
Week 24
Viability
Week 24