Chapter 12: Conception and Prenatal Development: Developmental Stages Flashcards
1
Q
Head large
A
5 weeks
2
Q
Large head at beginning but body grows faster
A
9-12 weeks
3
Q
CNS developing
A
3 weeks
4
Q
Translucent skin
A
21-24 weeks
5
Q
Zygote secretes hCG
A
0-2 weeks
6
Q
Heart starts beating, continued development
A
5 weeks
7
Q
Fingers and toes well defined
A
8 weeks
8
Q
Implantation complete
A
2 weeks
9
Q
Neural tube closes
A
4 weeks
10
Q
Early heart development
A
3 weeks
11
Q
Blood formation shifts to spleen
A
10-12 weeks
12
Q
External genitalia begin to differentiate
A
8 weeks
13
Q
Blood formation primarily in liver
A
6 weeks
14
Q
Usually positions to head down
A
25-28 weeks
15
Q
Nutrition provided by conceptus ball
A
0-2 weeks
