共 14 条
[1]
Campbell AS, Warsof SL, Little D, Cooper DJ., Routine ultrasound screening for the prediction of gestational age, Obstet Gynecol, 65, pp. 613-620, (1985)
[2]
Waldenstrom 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, 76, pp. 336-338, (1990)
[3]
Persson PH, Kullander S., Long‐term experience of general ultrasound screening in pregnancy, Am J Obstet Gynecol, 146, pp. 942-947, (1983)
[4]
Belfrage P, Femstrom I, Routine or selective ultrasound examinations in early pregnancy, Obstet Gynecol, 69, pp. 747-750, (1987)
[5]
Eik-Nes SH, Okland O, Aure JC, Ulstein M., (1984)
[6]
Dykowski M., Routine antenatal ultrasonography in a base population, Military Medicine, 155, pp. 549-551, (1990)
[7]
Saari-Kemppainen A, Karjalainen O, Ylostalo P, Heinonen OP., Ultrasound screening and perinatal mortality: controlled trial of systematic one‐stage screening in pregnancy. The Helsinki ultrasound trial, Lancet, 336, pp. 387-391, (1990)
[8]
Bennett MJ, Little G, Dewhurst J, Chamberlain G., Predictive value of ultrasound in early pregnancy: a randomized controlled trial, Br J Obstet Gynaecol, 89, pp. 338-341, (1982)
[9]
Grennert L, Persson P-H, Gennser G., Benefits of ultrasonic screening of a pregnant population, Acta Obstetricia et Gynecologica Scandinavica, pp. 5-14, (1978)
[10]
O'Brien GD, Robinson HP, Warren P., The 18 to 20 week obstetrical scan. A joint statement from The Australasian Society for Ultrasound in Medicine, The Royal Australian College of Obstetricians and Gynaecologists and The Royal Australasian College of Radiologists, Aust Med J, 158, pp. 567-570, (1993)