Secher N J, Kern Hansen P, Lenstrup C, Sindberg Eriksen P, Morsing G
Br J Obstet Gynaecol. 1987 Feb;94(2):105-9. doi: 10.1111/j.1471-0528.1987.tb02334.x.
A total of 2771 pregnant women with gestational age estimated by ultrasound measurement of the fetal biparietal diameter (BPD) before the 22nd week of gestation were re-examined by ultrasound in the 32nd and 37th week of pregnancy at which time the fetal BPD and abdominal diameter (AD) were measured. An additional examination was performed at 34 weeks if the fetal weight in the 32nd week was estimated to be less than 95% of the expected mean weight. Light-for-gestational age (LGA) was suspected if the estimated birth-weight was less than 85% of the expected mean birthweight. This applied to 186 uncomplicated pregnancies in which there was no clinical suspicion of poor intrauterine growth. These pregnancies were randomly allocated to a treatment group (AD and estimated weight reported) or to a control group (AD and estimated weight withheld). Induction of labour was significantly more common in the treatment group (41%) than in the control group (15%). No statistically significant difference was found in the use of instrumental vaginal delivery or caesarean section. There was a suggestion of marginal benefit in terms of neonatal morbidity but this was not statistically significant.
共有2771名孕妇，在妊娠22周前通过超声测量胎儿双顶径（BPD）来估算孕周，在妊娠第32周和第37周时再次接受超声检查，此时测量胎儿双顶径和腹径（AD）。如果第32周时估计胎儿体重低于预期平均体重的95%，则在第34周进行额外检查。如果估计出生体重低于预期平均出生体重的85%，则怀疑为小于胎龄儿（LGA）。这适用于186例无并发症的妊娠，这些妊娠临床上没有子宫内生长不良的怀疑。这些妊娠被随机分为治疗组（报告腹径和估计体重）或对照组（不提供腹径和估计体重）。治疗组引产的发生率（41%）明显高于对照组（15%）。在器械助产或剖宫产的使用方面未发现统计学上的显著差异。在新生儿发病率方面有边际效益的迹象，但这在统计学上不显著。
