First and third trimester ultrasound in the prediction of birthweight discordance in dichorionic twins

Factors affecting the accuracy of ultrasonographical fetal weight estimation in twin pregnancies

“…Particularly, when discordance increases, weight estimation bias of second fetus increases. These findings are consistent with the studies by Caravello [5,25].…”

Can discordance in CRL at the first trimester predict birth weight discordance in twin pregnancies?

“…A number of studies described a correlation between CRL discordance and birth weight discordance in twin pregnancies [1,4,8,10] . Such a correlation was suggested in both dichorionic (DC) and monochorionic (MC) pregnancies [8] , only in DC twins [4] , and was not found by others [2] . Furthermore, CRL discordance may be an early sign of twin-to-twin transfusion syndrome (TTTS) in MC twin pregnancies [19,20] and may also be associated with adverse pregnancy outcomes including premature rupture of membranes, preterm delivery, admission to neonatal intensive care unit, and increased risk of fetal loss [4,5,21] .…”

Intrauterine growth: prenatal and postnatal evaluation

“…‹kizlerin a¤›rl›k farklar› için intrauterin ve postnatal %15-25 aras›nda de¤iflen s›n›rlar verilse de aradaki fark %20'den fazla ise buna ikizler aras› diskordans ad› verilir (Resim 1). [23] Küçük olan ikiz SGA gibi alg›lanmal› ve postnatal yaflayaca¤› sorunlar yak›ndan izlenmelidir. ‹kizleraras› farkl›l›k prenatal dönemde; biparyetal çapta 6 mm, kar›n çevresinde 20 mm, femur boyunda 5 mm ve tahmini fetal a¤›rl›kta %15'i geçen farkl›l›kla anlafl›l›r.…”