Since multiples tend to weigh less
than singletons, and it's not unusual for them to be preemies, you may want to consider the safest options for the
smallest babes.
The rates of ART
singletons born
small for gestational age (SGA) more
than halved between 1988 - 1992 and 2003 - 2007, falling from 7.6 % to 3.2 %, while the rates of SGA births among ART twins fell from 17 % to 14 %.