Objective To identify a group of deliveries to mothers with indicators of subfertility (SUBFERTILITY) Design Longitudinal cohort study Setting Massachusetts Patients 334 152 deliveries to Massachusetts mothers in a Massachusetts hospital between July 1 2004 31 2008 Interventions None Main Outcome Measure Subfertility was defined by an indication on current or past birth certificate or… Continue reading Objective To identify a group of deliveries to mothers with indicators