References
- Hegeman MA, Bekedam DJ, Bloemenkamp KW, Kwee A, Papatsonis DN, van der Post JA, Lim AC, et al. Pessaries in multiple pregnancy as a prevention of preterm birth: the ProTwin Trial. BMC Pregnancy Childbirth 2009;9:44–48.
- Dodd JM, Crowther CA, Haslam RR, Robinson JS. Timing of birth for women with a twin pregnancy at term: a randomised controlled trial. BMC Pregnancy Childbirth 2010;10:68–73.
- Weghofer A, Klein K, Stammler-Safar M, Worda C, Barad DH, Husslein P, Gleicher N. Can prematurity risk in twin pregnancies after in vitro ertilization be predicted? A retrospective study. Reprod Biol Endocrinol 2009;7:136–140.
- Aisien AO, Olarewaju RS, Imade GE. Twins in Jos Nigeria: a seven-year retrospective study. Med Sci Monit 2000;6:945–950.
- Satija M, Sharma S, Soni RK, Sachar RK, Singh GP. Twinning and its correlates: community-based study in a rural area of India. Hum Biol 2008;80:611–621.
- Baxi A, Kaushal M. Outcome of twin pregnancies conceived after assisted reproductive techniques. J Hum Reprod Sci 2008;1:25–28.
- Pope RJ, Weintraub AY, Sheiner E. Vaginal delivery of vertex-nonvertex twins: a fading skill? Arch Gynecol Obstet 2010;282:117–120.
- Andersen AN, Goossens V, Ferraretti AP, Bhattacharya S, Felberbaum R, de Mouzon J, Nygren KG; European IVF-monitoring (EIM) Consortium; European Society of Human Reproduction and Embryology (ESHRE). Assisted reproductive technology in Europe, 2004: results generated from European registers by ESHRE. Hum Reprod 2008;23:756–771.
- Smith GC, Fleming KM, White IR. Birth order of twins and risk of perinatal death related to delivery in England, Northern Ireland, and Wales, 1994-2003: retrospective cohort study. BMJ 2007;334:576–578.