3Vercellini P,Huliani G,Rognoni MT,et al.Pregnancy at forty and over:acase-control study .Eur J Obstet Gynecol Reprod Biol ,1993 ,48:191-195.
4Dornhorst A ,Paterson CM ,Nicholls JS ,et al .High prevalence of gestational diabetes in women from ethric minority groups .Diabet Med ,1992 ,9:820:825.
5Vercellini P ,Zuliani G ,Rognoni MT ,et al .Pregnancy at forty and over :a case-control study .Eur J Obstet Gynecol Reprod Biol ,1993,48:191-195
6Dornhorst A ,Paterson CM ,Nicholls JS ,et al .High prevalence of gestational diabetes in women from ethric minority groups .Diabet Med ,1992,9,820-825
