Physiological Changes in Pregnancy Flashcards
1
Q
How does energy demands change in pregnancy?
A
14% increased demand:
- Increased fat storage (4kg stored)
- Less protein requirement
- Insulin sensitivity decreases
- Mother absorbs less glucose
- More glucose available for baby
2
Q
How does the anatomy change in pregnancy?
A
- Striae gravidarum (abdomen)
- Stria distensae (medial thigh)
- Linea nigra
- Chloasma gravidarum (mask of pregnancy)
3
Q
What cardiac changes occur in pregnancy?
A
- CO increased 50%
- SV increased 35%
- Less peripheral resistance - progesterone
- HR increased 15-25%
- LAD on CXR due to compensatory LVH
4
Q
What respiratory changes occur in pregnancy?
A
- Tidal volume increased 30-50%
- Increased minute ventilation
- Feeling of breathlessness
- FRC decreases
- RR does not change
5
Q
What renal changes occur in pregnancy?
A
- More aldosterone created = fluid retention
- GFR increases in 1st trimester
6
Q
What haematological changes occur in pregnancy?
A
- Macrocytosis
- Neutrophilia
- Thrombocytopenia
- Dilutional anaemia
- Increased VWF, F7, F8, fibrinogen, PAI-1/2
- Decreased protein S
7
Q
What endocrinological changes occur in pregnancy?
A
- Biggest increase = oestriol
- Less increase = oestrone, oestradiol
- LH and FSH supressed