High-Risk Pregnancy Part 2 Flashcards Preview

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Flashcards in High-Risk Pregnancy Part 2 Deck (61)
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1

Which is more common- monozygotic or dizygotic twins?

Dizygotic

2

All dizygotic twins have what chorionicity/amniocity?

DCDA

3

Monozygotic twins where the embryo splits at days 0-3 after fertilisation (morula stage) will have what chorionicity/amniocity?

DCDA

4

Monozygotic twins where the embryo splits at days 4-7 after fertilisation (blastocyst stage) will have what chorionicity/amniocity?

MCDA

5

Monozygotic twins where the embryo splits at days 8-14 after fertilisation (implanted blastocyst stage) will have what chorionicity/amniocity?

MCMA

6

Monozygotic twins where the embryo splits at days 15+ after fertilisation (formed embryonic disc stage) will have what chorionicity/amniocity?

Conjoined twins

7

Other than ethnic origin, what are some risk factors for having DCDA twins?

Family history, increasing maternal age, fertility treatment

8

Individuals of what ethnic origin are at increased risk of having DCDA twins?

Afro-Caribbean

9

The chorionicity of a twin pregnancy is determined by what investigation, ideally before what gestation?

Ultrasound, ideally before 14 weeks

10

The presence of the lambda or twin peak sign on ultrasound indicates which chorionicity of twin pregnacy?

Dichorionic

11

The presence of the T sign on ultrasound indicated which chorionicity of pregnancy?

Monochorionic

12

Which chorionicity of twins are at an increased risk of pregnancy complications?

Monochorionic

13

When does twin anaemia-polycythaemia sequence typically occur?

After foetoscopic laser ablation for twin-twin transfusion syndrome

14

What happens to the AFP in a multiple pregnancy?

Raised

15

How often are monochorionic twin pregnancies scanned after 24 weeks?

Every 2 weeks

16

How often are dichorionic twin pregnancies scanned after 24 weeks?

Every 4 weeks

17

In twin pregnancies, serial ultrasound growth scanning is used from what gestation?

24 weeks

18

A size discordance of greater than what between twins or triplets is clinically significant?

> 25%

19

Twin-twin transfusion syndrome only occurs in which type of twin pregnancy?

MCMA

20

In MCMA twin pregnancies, ultrasound scans are carried out every 2 weeks from what gestation?

16 weeks

21

How is twin-twin transfusion syndrome treated in early pregnancy, i.e. < 26 weeks?

Foetoscopic laser ablation

22

How is twin-twin transfusion syndrome treated in late pregnancy, i.e. > 26 weeks?

Amnioreduction or septostomy

23

How often do monochorionic twin pregnancies have antenatal appointments?

Every 2 weeks

24

How often do dichorionic twin pregnancies have antenatal appointments?

Every 4 weeks

25

What supplements should be given to women with multiple pregnancies?

Iron, folic acid and aspirin

26

In an MCDA twin pregnancy, delivery is by induction or C-section at what gestation?

36 weeks

27

In a DCDA twin pregnancy, delivery is by induction or C-section at what gestation?

37 weeks

28

When is C-section recommended to mothers of twin pregnancies?

When the first twin is in the breech or transverse position

29

When and how should MCMA twins be delivered?

32 weeks by C-section

30

How should triplets or higher order births be delivered?

C-section