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Flashcards in Small & Large For Dates Deck (50)
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1

Give a differential for LFD

Wrong date
Fetal macrosomia
Polydramnio
DM
Multiple pregnancy

2

What is the definition of macrosomia?

Estimated fetus weight EFW >90th centile
(on customised growth chart)

3

What is the commonest pathological cause of macrosomia?

Maternal diabetes

4

What are the risks of macrosomia?

Labour complications eg >PPH, >shoulder dystocia

5

What is the definition of low birth weight?

Birth wt <2.5kg regardless of gestation

6

What is more common, monozygotic or dizygotic twins

Dizygotic (70%)

7

What causes dizygotisity?

2 ova + 2 sperm

8

What causes monozygosity?

1 fertilised egg splits

9

What does DCDA stand for and what does it mean?

Dichorionic diamniotic
2 placentas, 2 amniotic cavities
(MCMA just 1)

10

What type of twins are always DCDA?

Dizygotic

11

Are monozygotic twins DCDA, MCDA, MCDA or DCDA?

Can be any

12

How many days post fertilisation would a fertilised egg split to produce DCDA monozygotic twins?

0-3 days

13

How many days post fertilisation would a fertilised egg split to produce MCDA monozygotic twins?

4-7 days

14

How many days post fertilisation would a fertilised egg split to produce MCMA monozygotic twins?

8-14 days

15

What happens if a fertilised egg splits >15 days post fertilisation?

Conjoined twins

16

The normal S+S of pregnancy, such as hyperemesis, are increased in multiple pregnancy. T or F.

True

17

In multiple pregnancy, if one of the babies is breech, a caesarian is indicated. T or F

False, only if both babies breech

18

Multiple pregnancy is more common in [old/young] and [multi/nulliparous] mums

Old
Multiparous

(Also more common in ACT and +ve FH)

19

At what antenatal visit is multiple pregnancy confirmed?

12 week scan
(can see chorionicity)

20

When should you aim to deliver DCDA monozygotic twins?

37-38wk

21

When should you aim to deliver MCDA monozyogtic twins?

36wk

22

In multiple pregnancy delivery, how quickly should you aim to deliver baby 2 after baby 1?

Less than 30min
(IJ synctocinon after baby 1)

23

All multiple pregnancies should be given low dose aspirin LDA as prophylaxis for PET. T or F

True
(also give Fe supplement)

24

What condition of the amniotic fluid is more common in multiple pregnancy?

Oligohydramnios

25

What is oligohydramnios?

Insufficient / decreased amniotic fluid vol

26

What is polyhydramnios?

Excess amniotic fluid

27

Polyhydramnios can cause _____ membrane rupture.

early

28

What might be found on antenatal abdominal exam in polyhydramnios?

Tense shiny abdo
Hard to palpate baby

(also abdo discomfort and LFD)

29

An US AFI amniotic fluid index greater than 25 is indicative of _______

polyhydramnios

30

In the Mx of polyhydramnios, labour should be induced by ____ weeks

40