Papiernik E, Richard A, Tafforeau J, Keith L
Maternity of Port-Royal, University René Descartes, Paris, France.
J Perinat Med. 1996;24(6):669-76. doi: 10.1515/jpme.1996.24.6.669.
Prenatal care was equally distributed to all twin pregnant women of the district of Haut de Seine in France in 1989-91, without differences by socio-economic level. No difference in rates of preterm births and very early preterm births (26-31 weeks) was measured by socioeconomic level among twin pregnancies.
1989年至1991年期间,法国上塞纳省的所有双胎孕妇均平等地获得了产前护理,且不存在社会经济水平差异。在双胎妊娠中,按社会经济水平衡量,早产和极早早产(26 - 31周)的发生率没有差异。