multiple pregnancy Flashcards
types of siamese twins
thoracopagus ( most common)
pyopagus( POSTERIOR fusion )
craniopagus( cephalic)
ischiopagus ( caudal )
layers of membrane seprating dizygotic twins
amniom,chorion,chorion,amnion
layer of membrane aeprating monozygotic twins
two layers of amnion only
superfecumdation
2 ova realsed in same cycle.and fertilised by seprate acts of coitus
superfetation
2 ova realesed in different menstrual cycle
usually development of one fetus over other
fetus papyraceous or compressus
if one fetus dies early and dead fetus is flattened , mummified , compressed between grrowing fetus and uterine wall
FETUS ACARDIACUS
one fetus is amorphic and becomes parasitic without heart
ausculation findding in multiple pregnancy
2 distinct FETAL HEART SOUND at seprate areas with silemt area in be by 2 different observers
lambda sign / twin peak sign seen in ?
multiple pregnancy dichorionic placenta
in dichorionic placenta there is potential space bw intertwin membrane which if filled by proliferating placental villi
appears as base at chorionic surface and apex in intertwin membrane
other name of lambda sign
twin peak sign
T sign
one gestational sac with thin dividing membrane and 2 fetuses
monochorionic diamniotic
DD OF MULTIPLE PREGNANCY
hydramnios
ovarian tumor / fibroid with pregnancy
big baby
h mole
discordant growth
true pathological discordance is said when estimated weight difference is 25% or more
polyhydramnioa is defined when???
liquor > 2000ml
AFI > 18
deepest vertical diameter > 8cm
classification of polyhydramnios
DEEP VERTICAL POCKET
mild 8-11
moderate 12-15
severe > 16
