Note: MA: manual acupuncture; EA: electroacupuncture; LA: laser acupuncture; Acu.: acupuncture. NT: non intervention treatment; RX: relaxation. A: acupuncture was used around the time of embryo transfer (ET); B: acupuncture was used around the time of oocyte aspiration (OA); C: acupuncture was mainly performed during the course of controlled ovarian hyperstimulation (COH); CPR: clinical pregnancy rate; LBR: live birth rate; Westergaard 2006 MA (2): two MA groups; Benson 2006, Fratterelli 2008 NT, or RX (2): two controlled groups. ITT: intention to treat analysis; TPP: treated-per-protocol analysis.