Maternity - Fetal physiologic adaptation to pregnancy

Question 0

What is Naegele’s rules?

Answer 0

First day of last menstrual period = dd/mm

Due date = d+ 7 / m -3

Question 1

What is gestational age or menstrual age ?

Answer 1

The first day of last menstrual period - x.
2 w before ovulation
3 w before implantation

Question 2

How does the timing of division affect the development of monozygotic twins?

Answer 2

Divisions occurs < 72 h –> 2 amnions, 2 chorions
4-7 days: 2 amnions, 1 chorions
After 7 days: 1 amnions, 1 chorions

Question 3

Embryologic remnant

Umbilical vein

Answer 3

Lig. Hepatis

Question 4

Ductus venosus

Answer 4

Lig. Venosum

Question 5

Ductus arteriosus

Answer 5

Lig. Arterosum

Question 6

Umbilical arteries

Answer 6

Medial umbilical lig

Question 7

How does pregnancy affect cardiac output, blood volume, blood pressure?

Answer 7

CO increases up to 50%
Blood volume increase by 50%
BP decreases

Question 8

Pregnancy affects which components of CO?

Answer 8

CO= Stroke volume x Heart rate

SV increases more than HR

Question 9

How does pregnancy affect SV?

Answer 9

Increase blood volume –> increase preload

Low-resistance uteroplacetal circulation / peripheral dilation–> decrease afterload