Multiple Gestations Flashcards Preview

OB/GYN > Multiple Gestations > Flashcards

Flashcards in Multiple Gestations Deck (24)
0

What will the donating twin on Twin Twin Transfusion Syndrome look like on UD

Oligohydramnios
Small for gestational age
Absent bladder
IUGR
Dilated heart

1

Dizygotic

Dichorionic Diamniotic
Fraternal
Thick membrane
2 placentas

2

Monozygotic

Identical

Mono mono: most severe. 50% mortality
Mono di
Di di

3

Complications

Premie, PROM, htn, preeclampsia, SUA, IUGR, polyhydramnios, congenital anomalies, twin twin transfusion

4

Lambda sign / Twin peak sign

2 placentas. Projection

5

Conjoined twins occur after _ days

13

6

Twin twin transfusion

Abnormal shunting of blood from one fetus to the other.
Occurs mono chorionic twins
Mono mono or mono di

Donor: IUGR, oligo
Recipient: CHF, hydrop, poly

Weight discordance > 20%
Abnl Doppler

7

Conjoined Twins

70% female, poly, high mortality
Seen after 13 days

MC Thoracopagus and Omphalopagus

8

Craniopagus

Joined at head

9

Diprosopus

2 face 1 head

10

Dicephalus

2 heads 1 body

11

Parapagus

2 head 2 face 1 wide body.

12

Ischiopagus

Joined at ischium

13

Omphalopagus

Joined abd

14

Omphaloischiopagus

Abd & ischia

15

Pygopagus

Joined at butt

16

Superfecundation

2 eggs fertilized at different times within same cycle

17

Superfetation

2 eggs fertilized in different cycles

18

Thoracopagus

Joined at thorax

19

Thoracoomphalopagus

Joined thorax & abdomen

20

Vanishing twin

An embryonic GS
Fetal demise

21

Parasitic Twin / Fetus in Fetu

Found in Abd of sibling
Benign. Has spine parts.

22

TRAP sequence / Twin Reversal Arterial Perfusion / Parabolic Twin

Acardiac monster
Mono chorionic
Pump twin and acardiac twin
Artery to artery communication
Acardiac twin gets blood from normal twin.
Upper body doesn't form.
Pump twin may get CHF, 50% mortality

23

Fetus Papyraceus / Paper Doll Fetus

Have demise, separate sac. Oligo develops and gets flattened.