Birth order and oral clefts: a meta analysis.

  title={Birth order and oral clefts: a meta analysis.},
  author={Alexandre R Vieira and I{\^e}da Mario Orioli},
  volume={66 5},
BACKGROUND There is evidence that late birth order is associated with some complex disorders. For orofacial clefts there is no consensus as to whether increased birth order is associated or not. A meta-analysis of published data on cleft lip or cleft palate (CL/P and CP) was carried out to ascertain whether there is an increased risk for children of high birth order to have an oral cleft. METHODS All data available with information regarding the frequency of live births and CL/P and CP cases… CONTINUE READING