Botting B J, Davies I M, Macfarlane A J
Medical Statistics Division, Office of Population Censuses and Surveys, London.
Arch Dis Child. 1987 Sep;62(9):941-50. doi: 10.1136/adc.62.9.941.
The overall incidence of multiple births in England and Wales, which had been declining since the early 1950s, started to increase in the early 1980s in all age groups except for women under 20. This followed a rise in the incidence of triplet and higher order multiple births which had started in the late 1970s. Analyses of data for births between 1978 and 1983 showed that while stillbirth, perinatal, neonatal, and post-neonatal mortalities among multiple births fell considerably, they remained consistently higher than those for singleton births. Differences in the distribution of birth weight do not wholly explain these differences. Analyses of certified causes of stillbirth and death are difficult to interpret because a considerable proportion were attributed to 'multiple pregnancy'.
自20世纪50年代初以来一直在下降的英格兰和威尔士多胞胎总体发生率,在20世纪80年代初开始上升,20岁以下女性除外的所有年龄组均是如此。这是在20世纪70年代末开始的三胞胎及更高阶多胞胎发生率上升之后出现的情况。对1978年至1983年出生数据的分析表明,虽然多胞胎中的死产、围产期、新生儿和新生儿后期死亡率大幅下降,但仍一直高于单胞胎的死亡率。出生体重分布的差异并不能完全解释这些差异。对死产和死亡的经认证原因进行分析很难解读,因为相当一部分被归因于“多胎妊娠”。