Pregnancy outcomes in women with moderate-to-severe psoriasis.

Background: The association between psoriasis and pregnancy outcomes has not been adequately examined, although psoriasis onset is common in the reproductive period.

Objective: To evaluate the association between moderate-to-severe psoriasis and pregnancy complications.

Methods: A retrospective, matched cohort study of 68 deliveries in 35 women with moderate-to-severe psoriasis compared to 237 deliveries in 236 women without psoriasis randomly selected after matching for age, parity and gestational age.

Results: The psoriasis patients had higher mean of past spontaneous (0.42±0.58 vs. 0.26±0.63, P=0.002) and induced (0.32±0.60 vs. 0.06±0.25, P=0.001) abortions than controls. They had a higher percentage of pregnancy-induced hypertensive diseases (7.4% vs. 2.1%, P<0.05) and premature rupture of membranes (16% vs. 5.5%, P<0.008). Newborns to women with psoriasis had higher birth weight (3375±543 g vs. 3247±460 g, P=0.03), increased percentage of large-for-gestational age (24% vs. 12%, P=0.02), and macrosomia (13% vs. 4.2%P=0.02). In multivariate analysis, moderate-to-severe psoriasis was an independent risk factor for previous spontaneous abortions, induced abortions, premature rupture of membranes (PROM), and newborn macrosomia.

Conclusion: Moderate-to-severe psoriasis is associated with spontaneous and induced abortions, pregnancy-induced hypertensive diseases, premature rupture of membranes, large-for-gestational age newborns, and macrosomia.