Screening for SGA by the roll-over test.

The roll-over test (ROT) was evaluated in normal pregnant patients between 28 and 34 weeks' gestation and found to be an accurate method of screening for small-for-gestational age (SGA) infants and for preeclampsia. Patients with a positive ROT had a significant risk of SGA or preeclampsia or both. In patients with a positive ROT, the development of SGA may be further predicted by an examination of maternal prepregnancy weight and weight gain. Patients with a prepregnancy weight of 50 kg or less, total weight gain of 10 kg or less, and/or differential weight gain of 20% or less have a highly significant risk of developing an SGA fetus. In contrast, patients with a negative ROT have a significantly decreased risk for SGA and/or preeclampsia.