Multiple Pregnancy

Question 1

Usg findings in 1st trimester

Answer 1

Number of gestational sacs
Chorionicity-
Lamba or twin peak sign
Tsign in monochorionic diamniotic twins

Question 2

Vanishing twin

Answer 2

If previous usg showed two sacs or two cardiac activity but subsequent usg shows one sac or one heart beat

Question 3

Usg findings of second trimester

Answer 3

Number of foetuses, position and localisation of placenta, foetal anomalies and discordant twin

Question 4

What are discordant twins?

Answer 4

Difference in BPD, 5mm
Difference in abdominal circumference 20mm
Difference of 15-25% in foetal weight

Question 5

Twin to twin transfusion

Answer 5

Occurs in monochorionic placentation due to av anastomosis with resultant flow in one direction

Question 6

Unique complications of monochorionic twins

Answer 6

Twin to twin transfusion syndrome
Twin reversal arterial perfusion
Conjoint twin
Acardiac foetus