title: Long-term use of oral contraceptives increases the risk of miscarriage.
abstract: In this prospective, case-control study, a step-wise logistic regression model was used to examine the relationship between the consumption of oral contraceptives before pregnancy and the potential increase in the risk of miscarriage. Consumption of oral contraceptives for more than 2 years before pregnancy is associated with a higher risk of miscarriage.
authors.affiliation: Unidad de Reproducción Humana, Clínica Tambre, Madrid, Spain. agarciaen@sego.es
authors.forename: Alberto
authors.initials: A
authors.lastname: García-Enguídanos
authors.forename: David
authors.initials: D
authors.lastname: Martínez
authors.forename: Maria Elisa
authors.initials: ME
authors.lastname: Calle
authors.forename: Sonsoles
authors.initials: S
authors.lastname: Luna
authors.forename: Javier
authors.initials: J
authors.lastname: Valero de Bernabé
authors.forename: Vincente
authors.initials: V
authors.lastname: Domínguez-Rojas
mesh_terms: D000022:Abortion, Spontaneous / Q000139:chemically induced* / Q000453:epidemiology; D000328:Adult; D016022:Case-Control Studies; D016001:Confidence Intervals; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D016015:Logistic Models; D016017:Odds Ratio; D011247:Pregnancy; D011446:Prospective Studies; D012307:Risk Factors; D013995:Time
chemical_list: D003276:Contraceptives, Oral