Embryonic development in days Flashcards
1
Q
Day 1
A
Fertilisation
2
Q
Day 2
A
Two cell stage
3
Q
Day 3
A
Morula
4
Q
Day 4
A
Early blastocyst
5
Q
Day 5
A
Late blastocyst
6
Q
Day 6-7
A
Implantation into endometrium of uterus
7
Q
Day 8
A
Bilaminar disc forms
8
Q
Day 9
A
Trophoblast with lacunae
9
Q
Day 10-11
A
Embryo in uterus 10-11 days after ovulation
10
Q
Day 12
A
Extraembryonic mesoderm develops
11
Q
Day 13
A
Uteroplacental circulation begins
12
Q
Day 14
A
Embryonic disc: dorsal view
13
Q
Day 15
A
Laterally established
14
Q
Day 16
A
Gastrulation: formation of germ layers
15
Q
Day 17
A
Epiblast forms germ layers
16
Q
Day 18
A
Trilaminar embryoic disc
17
Q
Day 19
A
CNS induction
18
Q
Day 20
A
Neurulation: neural folds elevate