When conducting research for ASQ-3 and ASQ:SE-2, the authors used 39 weeks of gestation as a full-term pregnancy. However, some programs use 38 weeks or 40 weeks of gestation as a full-term pregnancy, which is also fine. When using ASQ-3 or ASQ:SE-2, you adjust for prematurity if a child is born 3 or more weeks premature. If your program considers a full-term pregnancy to be 40 weeks of gestation, then a child born at 37 weeks or earlier would be considered premature. If your program uses 38 weeks of gestation to represent a full-term pregnancy, then a child born at 35 weeks or earlier would be considered premature.