References
- Grennert L, Perssson P ‐H, Gennser G. Benefits of ultrasonic screening of a pregnant population. Acta Obstet Gynecol Scand 1978; 57(Suppl 78)5–14
- Campbell S, Warsof S, Little D, Cooper D J. Routine ultrasound screening for the prediction of gestational age. Obstet Gynecol 1985; 65: 613–20
- Saari‐Kemppainen A, Karjalainen O, Ylöstalo P, Heinonen O P. Ultrasound screening and perinatal mortality: controlled trial of systematic one‐stage screening in pregnancy. Lancet 1990; 336: 387–91
- Waldenström U, Axelsson O, Nilsson S, et al. Effects of routine one‐stage ultrasound screening in pregnancy: a randomised controlled trial. Lancet 1988; 2: 585–8
- Persson P ‐H, Weldner B ‐M. Normal range growth curves for fetal biparietal diameter, occipito‐ frontal diameter, mean abdominal diameters and femur length. Acta Obstet Gynecol Scand 1986; 65: 759–61
- Waldenström U, Axelsson O, Nilsson S. A comparison of the ability of a sonographically measured biparietal diameter and the last menstrual period to predict the spontaneous onset of labor. Obstet Gynecol 1990; 76: 336–8
- Bergsjö P, Denman D W, Hoffman H J, Meirik O. Duration of human singleton pregnancy. Acta Obstet Gynecol Scand 1990; 69: 197–207
- Mittendorf R, Williams M A, Berkey C, Cotter P F. The length of uncomplicated human gestation. Obstet Gynecol 1990; 75: 929–32