Multiple pregnancies

Question 1

What does zygotisity refer to?

Answer 1

Number of eggs fertilised

Monozygote: one egg fertilised and separates after a couple of days

Dizygote: two eggs fertilised

Question 2

What does chronicity refer to?

Answer 2

Number of placentas

Question 3

What does amniocity refer to?

Answer 3

Number of amniotic sacs

Question 4

Increased risk of dizygotic pregnancy

Answer 4

• Older age
• Parity
• FH
• Fertilisation treatment
• Ethnicity
• Race

Question 5

What increases the risk of a monosygote twin pregnancy?

Answer 5

UNKNOWN

Question 6

What are some of the common complications associated with multiple pregnancies?

Answer 6

• Pre- term
• Perinatal mortality
• Growth restrictions
• Cerebral palsy
• Twin transfusion syndrome
• Malpresentation

Question 7

Presentation

Answer 7

• Large uterus
• Multiple fetal poles
• Multiple fetal hearts
• US distinguishes between chorionic and dichorionic

Question 8

What is twin transfusion syndrome?

Answer 8

• Condition which presents in Monochorionic twins
• Abnormality in blood vessel presentation means that one twin receives more blood flow than the other
• Donor becomes dehydrated
• Recipient becomes overloaded- increased BP and fluids which can spill out into the placenta