Flashcards in Foetal Growth And Development Deck (19):
Duration of pregancy dating
Last menstrual period
Uterine size - symphysis fundal height
Developmental criteria- biomarkers, biometrics (head circumference vs abdomen, amniotic volume) ultrasound
How to measure fundal height
Not lying flat (supine hypotension)
Locate top if the fundus to pubic symphysis
Share with woman, record and plot
Current average birth weight
What are the landmarks of the gravid uterus in each trimester?
End of 1st trimester - lifts out of the pelvis
2nd trimester - umbilicus
3rd trimester - xiphisternum
Markers of fundal height
1cm per week of pregnancy
Sources of error in fundal height
Acute distress in Iabour
Health of the baby in utero is compromised.
Biophysical growth measurements
B - breathing
A - amniotic fluid
T - tone
H - heart rate
M - movements
When are foetal movements felt?
Detected at 8 weeks
Felt at 18-20 weeks
Why is monitoring foetal movements is important
Change in foetal movements can indicate development.
Increase with growth
Decrease can indicate compromise
Ultrasound scanning in pregnancy
12 weeks, dating or viability scan
20 weeks is an anomaly scan
Preterm babies are small and physiologically immature. Which organ needs to be managed and why?
Drugs used to prevent labour
Allows administration if corticosteroids to accelerate foetal lung maturity
(And transfer to a suitable unit)
2 main types:
Asymmetrical - head sparing, most commonly extrinsic factors later in pregnancy. Loss of abdominal fat.
Symmetrical - undernourished, genetic
Causes of asymmetrical IUGR
Birthweights of a large, small and average baby
Large: over 4.5kg
Small: under 2.5kg
When is the period of most foetal growth?
third trimester, between 20-40weeks (300g-3kg)