[Clinical outcomes of twin pregnancies conceived by in vitro fertilization compared with spontaneous twin pregnancies].

Objective: To compare the maternal and perinatal outcomes of twin pregnancies conceived by in vitro fertilization (IVF) with outcomes of spontaneous twin pregnancies.

Methods: A retrospective analysis was conducted between January 2010 and April 2014 to investigate the maternal age, gestation length, modes of delivery, pregnancy complications and neonatal physical development, birth defects and perinatal diseases in 106 IVF-assisted twin pregnancies (IVF group) and 256 spontaneous twin pregnancies (control group).

Results: The mothers in the IVF group were significantly older than those in the control group (32±4 years vs 28±4 years, P<0.