1Katwijk CV,Peeters LLH.Clinical aspects of pregnancy after the age of 35 years:a review of the literature[J].Hum Reprodu Update,1998,4(2):185-194.
2Marcus SF,Brinsden PR.In-vitro fertilization and embryo transfer in women aged 40 years and over[J].Hum Reprod Update,1996,2(6):459-468.
3Canterino JC,Ananth CV,Smulian J,et al.Maternal age and risk of fetal death in singleton gestations:USA,1995-2000[J].J Matern Fetal Neonatal Med,2004,15(3):193-197.
4Burt VL,Whelton P,Rocella EJ,et al.Prevalence of hypertension in the US adult population[J].Hypertension,1995,25 (3):305-313.
5Jacobsson B,Ladfors L,Milsom I.Advanced maternal age and adverse perinatal outcome[J].Obstet Gynecol,2004,104 (4):727-733.
3Chiechi LM,Fanelli M,Lobascio A. Pregnancy in women over 35 years of age: what risk[J]. Minerva Ginecol,1996,48(10):391.
4Seoud MA, Nassar AH, Usta IM, et al. Impact of advanced maternal age on pregnancy outcome[J]. Am J Perinatol, 2002,19 ( 1 ) : 1.
5Jolly M, Sebire N, Harris J, et al. The risks associated with pregnancy in women aged 35 years or older[J]. Hum Reprod,2000,15 (11 ):2433.
6Ecker JL,Chen KT,Cohen AP,et al. Increased risk of cesarean delivery with advancing maternal age: indications and associated factors in nulliparous women[J]. Am J Obstet Gynecol, 2001,185 (4) : 883.
7Kozinszky Z, Orvos H, Zoboki T,et al. Risk factors for cesarean section of primiparous women aged over 35 years[J]. Acta Obstet Gynecol Scand,2002,81(4):313.
8Edge V, Laros RK. Pregnancy outcome in nulliparous women aged 35 or older[J]. Am J Obstet Gynecol, 1993,168:1881.
9Chan BC,Lao TT. Influence of parity on the obstetric performance of mothers aged 40 years and above[J]. Hum Reprod, 1999,14(3) :833.
10Milner M,Barry KC,Unwin A,et al. The impact of maternal age on pregnancy and its outcome[J]. Int J Gynaecol Obstet, 1992,38(4) : 281.
