Women's Health : Small for Gestational Age (SGA) Flashcards
Define the parameters for a baby being labelled as ‘Small for Gestational Age’ (SGA)
Estimated foetal weight less than the 10th centile
What does intrauterine / foetal growth restriction (IUGR / FGR) imply?
Implies a pathological restriction of full genetic growth potential (RCOG definition)
Severe SGA is defined at…
EFW less than 3rd centile
Which 5 measurements are taken as part of surveillance of foetal size?
- Symphyseal fundal height
- Foetal abdominal circumference
- Femur length
- Head circumference / biparietal diameter
- Liquor volume / amniotic fluid index
When is symphyseal fundal height measured?
Regularly at routine antenatal appointments from 24+0 onwards
Normal amniotic fluid index range?
5-25cm
Odds ratio for SGA risk factors?
> 2.0
Name some major risk factors for SGA?
Maternal age, smoking, cocaine, vigorous exercise, previous SGA baby, previous stillbirth, maternal/paternal SGA, chronic HTN, diabetes w/ vascular diseases, antiphospolipid syndrome
Maternal age as SGA risk factor?
> 40
Cigarette count increasing SGA risk?
> 11 per day
Risk factor: maternal vigorous exercise?
Yes, daily
Diabetes with which condition increases SGA risk?
Vascular disease
Minor risk factors for SGA?
Nulliparity, pre-eclampsia
Name some major risk factors for SGA that may occur during pregnancy
Pre-eclampsia, unexplained APH, low maternal weight gain
What is the first line investigation (for SGA) for routine fetal monitoring?
SFH measurement
