Correlation between acupuncture dose and pregnancy outcomes in women with polycystic ovary syndrome undergoing in vitro fertilization-embryo transfer: a systematic review. - Li YT; Li CL; Yang H; Huang L; Liu JJ; Zheng XY; Tao XY; Yu Z; Liang FR; Tian XP; Yang J (BMC complementary medicine and therapies, 2024)