Assisted reproduction outcomes：direct singleton pregnancy vs. singleton pregnancy after reduction of mul⁃ tiple pregnancies

JIN Chunyan, LIU Liying, GUO Yi, SHI Chunxiao.
The Journal of Practical Medicine . 2023, (5): 625 -630 .  DOI: 10.3969/j.issn.1006⁃5725.2023.05.017