Small and Large for Birth Flashcards
what is preterm delivery?
delivery before 37 weeks gestation
what is moderate to extreme preterm?
moderate: 32-36 +6 weeks
very preterm: 28-31 +6 weeks
extreme preterm: 24-27 +6 weeks
what is the survival rate for preterms beyond 32 weeks?
>95%
even a week can increase survival by >10%
what are causes of preterm birth?
infection
over-distension (multiple/ polyhydraminos)
placental abruption
cervical incompetence
idiopathic
what are risk factors for preterm birth?
previous PTL
multiple
teenager
smoking
BMI <20
below what centile is considered small for gestational age?
foetal weight or abdo circumference below 10th centile
what is IUGR?
intra uterine growth restriction → failure to achieve growth ptoential
what are the risks with IUGR to baby?
hypoxia and or death antenatal/ in labour
what is low birth weight?
<2.5kg regardless of gestation
how is a diagnosis of small for gestational age made?
measurement of foetal abdo circumference combined w head circumference +/- femur length
what are clinical features of poor growth?
fundal height less than expected
reduced liqour
reuced foetal movements
what are the scores for US assessment when looking at growth?
satisfactory 8-10
repeat 4-6
deliver 0-2
what does ultrasound assessment of baby consider?
movement
time
foetal breathing movements
liqour
if considering/plannign early delivery (i.e. preterm) what shoud be given?
steroids
magnesium sulphate
what is classed as large for date?
symphyseal fundal height >2cm for gestational age
