Preterm birth in twins after subfertility treatment: population based cohort study.

  title={Preterm birth in twins after subfertility treatment: population based cohort study.},
  author={Hans Verstraelen and Sylvie Goetgeluk and Catherine A. Derom and Stijn Vansteelandt and R. Derom and Els Goetghebeur and Marleen Temmerman},
  volume={331 7526},
OBJECTIVES To assess gestational length and prevalence of preterm birth among medically and naturally conceived twins; to establish the role of zygosity and chorionicity in assessing gestational length in twins born after subfertility treatment. DESIGN Population based cohort study. SETTING Collaborative network of 19 maternity facilities in East Flanders, Belgium (East Flanders prospective twin survey). PARTICIPANTS 4368 twin pairs born between 1976 and 2002, including 2915 spontaneous… CONTINUE READING
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