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obstetrics_twin pregnancy (delivery (presenting twin: cephalic…
obstetrics_twin pregnancy
MC
conjointed twin
selective intrauterine growth restriction sIUGR
twin-twin transfusion syndrome TTTTs
twin anemia polycythemia sequence TAPS
twin reversed arterial perfusion sequence TRAPS
chorionicity
different sex
separate placenta
fetal membrane (first trimester)
(amnion, chorion) DC
(amnion) MC
placental membrane (second trimester)
(T sign) MC
lambda sign/twin peak sign (V sign) DC
delivery
presenting twin: cephalic presentation: vaginal delivery
Caesarean section 34-37 week
triplets 34
MCMA 34
MCDA 37
DCDA 38
recipient
polyhydramnios (MVP > 8cm)
distended bladder
CTR >50%, heart failure
(middle cerebral artery peak systolic velocity) polycythemia
donor
oligohydramnios (MVP < 2cm)
empty bladder
CTR < 50%
(uterine artery Doppler) absent/reverse end diastolic flow
(middle cerebral artery peak systolic velocity) anemia
zygosity
dizygotic
monozygotic
chorioamnionicity
dizygotic
dichorionic diamniotic
monozygotic
DCDA
similar (amnion, chorion)
MCDA
similar (amnion)
MCMA
nothing in between
MCMA (conjointed twins)
DCDA: separate
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