9World Health Organization. Unsafe abortion. Thin:l edition, Division of Reproductive Health ( Technical Support ). ( WHO/RHR/MSM/97.16). Geneva. 1998.
10Hale RW, Kobara TY, Sharma SD, et al. Office termination of pregnancy by menstrual aspiration. AM J Obstet Gynecol. 1979. 134,213.
1.Unsafe abortion Global and regional estimates of incidence of and mortality due to unsafe abortion with a listing of available country data[]..1998
2Nancy London.Handbook of Family Planning[]..1991
3World Health Organization. Safe abortion: technical and policy guidance for health systems (second edition)[M]. Geneva: WHO. 2012.
4Iuni P. Altman DG. Egger M. Systematic reviews in health care: assessing the quality of controlled clinical trials[J]. BMJ. 2001.323: 42-46.
5HigginsJPT. Green S. Cochrane handbook for systematic re?views of interventions 5.1.0[EB/OL].[2015-04-24].www.co?chrane. hand book.org.
6Dean G, Cardenas L, Darney P, et al. Acceptability of manu?al versus electric aspiration for first trimester abortion: a ran- domized trialj Fj.Contraception , 2003,67: 201-206.
7Mittal S,Sehgal Rv Aggarwal S.Cervical priming with misopr?ostol before manual vacuum aspiration versus electric vacuum aspiration for first-trimester surgical abortion[J]'Internation?alJournal of Gynecology and Obstetrics, 2011 , 112 :34-39.
8HemlinJ, Moller B. Manual vacuum aspiration. a safe and effective alternative in early pregnancy termination[J]. Acta Obstet Gynecol Scand,2001 ,80:563-537.
9Edelman A, Nichols MD,JensenJ. Comparison of pain and time of procedures with two first trimester abortion tech?niques performed by residents and faculty[J]. AmJ Obstet Gynecol,2001,184:1564-1567.
