CJCP     2020 22 (3):  238-244    ISSN: 1008-8830  CN: 43-1301/R Association between maternal age and adverse pregnancy outcome in twin pregnancy YANG Min, XIAO Ling-Ling, WANG Ji-Mei Department of Neonatology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai 200011, China Received: 2019-09-16  Revised: 2020-01-13  Online: null Supporting info