Table 2.
Components of the overview scan in GRAPHSa.
| Components of overview scan | Comments |
| Determine if subject pregnant | If no fetal pole visible within uterus, repeat ultrasound scheduled in 1-2 weeks; ectopic precautions reviewed |
| Establish location of pregnancy | If extrauterine location suspected, woman referred urgently for care at hospital |
| Determine plurality of gestation | Women carrying more than one fetus referred for routine antenatal care |
| Evaluate viability of pregnancy | If no fetal heart motion detected, repeat ultrasound scheduled if ≤10 weeks; if >10 weeks, referred to hospital for evaluation of potential missed abortion |
aGRAPHS: Ghana Randomized Air Pollution Health Study