TWINNS Flashcards
twins born what week
37
trips born what week
34
quads born what week
33
Fetal mortality rates are _____X that of singleton pregnancies
3-6X
Neonatal mortality _____X that of single pregnancies.
7X
why does multiple have higher fatality
Primarily due to much higher incidence of premature labour.
Increased chance of dizygotic twins if:
increased maternal age frequent pregnancies pregnancy techniques -> hormone stimulation heredity -> mom is a twin race-> african
if there is a single outer membrane the twins must be
monozygotic
1/3 of monozygotic twins are
dichorionic/diamniotic
two types of DCDA
seperated and fused
0-4 days for split =
DCDA
8-13 days =
MCMA
why is chorionicity important
Monochorionic twin pregnancies have 3-5 times higher risk of perinatal mortality and morbidity than Dichorionic
Chorionicity best evaluated in ___ trimester
1st
Di chorion gives what sign
twin peak (lambda sign)