Twin Gestation

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created 10 years ago by stefan_mcfarland
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Lesson 16, Med 2, Spring 2013, UFPA 2014
Grade levels:
Graduate school, Professional
Subjects:
ob/gyn
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1

What percent of twins are monozygotic?

33% or 1/3

2

Best test to ID twins and assess zygosity?

U/S w/placentation

3

Types of twins

Monozygotic - identical, one egg splits
Dizygotic - fraternal, two eggs

4

What is twin-twin transfusion syndrome?

One twin gets more of blood than other one.

5

What factors increase risk of dizygotic twins? (there are none for monozygotic!)

Ethnicity, older age, positive fam hx, use of ovulation induction

6

Most common antepartum complications?

Cords tangled if monochorionic
spontaneous abortion
anomalies
preterm labor (1/3)
impaired growth
polyhydramnios
twin-twin transfusion syndrome
pre-eclampsia
placental abnormalities

7

Most common intrapartum and post partum complications?

Dysfunctional labor
Malpresentation
Abruption
Abnormal Fetal Heart Rate
Uterina atony leading to postpartum hemorrhage

8

What tests are of most use in IDing complications?

U/S and Family Hx

9

What factors are considered in determining delivery method of twin?

Presentation and Labor progress/problems

10

What is principal cause of higher order multiples?

Improper gonadotrophins during assisted reproductive techniques