Additional file 1. JBI critical appraisal checklist for analytical cross sectional studies. The evaluation of included studies made according to the Joanna Briggs Institute.
Note: Values are expressed as mean ± SD or percentage. Fertilization rate: two-pronuclear zygotes (2PNs)/total MII oocytes in ICSI cycle or fertilized oocytes/total oocytes in IVF cycle. Cleavage rate
