Abstract: 【Abstract】Objective: To investigate the background of infertility on the obstetric and perinatal outcomes. Methods: A total of 1 000 delivery women were investigated in Nanjing Medical University Affiliated Suzhou Hospital from June 1st, 2014 to December 31th, 2014 by self-designed questionary. Among these women, 136 women were defined infertility group as those who conceived over one year of normal sex life and had not received any assisted reproductive technology (ART). 272 women were selected as control group according to 1:2 matched method by matching singleton, age, parity, delivery method. 114 women who received IVF/ICSI and delivered in our hospital at the same period were defined ART group.Obstetric and perinatal outcomes were compared among these groups. Results: The incidence of low birth weight(11.03% vs. 5.15%) was significantly higher in the infertility group than in the control group(P<0.05). Conclusions: The infertility background affects the rate of low birth weight of newborns.

Key words: Infertility;female, Pregnancy complications, Pregnancy outcome, Premature birth, Infant;low birth weight, Infant;small for gestational age