References
- Campbell S, Warsof S L, Little D, Cooper D J. Routine ultrasound screening for the prediction of gestational age. Obstet Gynecol 1985; 65: 613–20
- Eik-Nes S H. Ultrasound assessment of human fetal weight, growth and blood flow. Thesis, University of Lund, Malmö 1980
- Grennert L, Persson P H, Gennser G. Benefits of ultrasoundscreening of a pregnant population. Acta Obstet Gynecol Scan 1978, Suppl 78: 5–14
- Hall M H, Carr-Hill R A, Fraser C, et al. The extent and antecedents of uncertain gestation. Br J Obstetr Gynaecol 1985; 92: 445–51
- Robinson H P, Fleming J E. A critical evaluation of sonar “crown-rump” length measurements. Br J Obstet Gynaecol 1975; 82: 702–10
- Secher N J, Kern Hansen P, Lenstrup C, et al. Birthweight for gestational age charts based on early ultrasound estimation of gestational age. Br J Obstet Gynaecol 1986; 93: 128–34
- Selbing A. The pregnant population and a fetal crown-rump length screening program. Acta Obstet Gynecol Scand 1983; 62: 161–4