Figure 2From: Candidate gene analysis of spontaneous preterm delivery: New insights from re-analysis of a case-control study using case-parent triads and control-mother dyads Combined results for fetal and maternal genes. QQ-plots showing the most significant results for the different designs when the effects of maternal and fetal genes are combined. A) Single locus, case-parent triad. B) Haplotype, case-parent triad. C) Single locus, hybrid. D) Haplotype, hybrid.Back to article page