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Table 2 Summary of IVF treatment cycle characteristics of all patients undergoing IVF: last cycle before and first cycle after bariatric surgery

From: Does bariatric surgery improve ovarian stimulation characteristics, oocyte yield, or embryo quality?

  Before surgery After surgery p
BMI    
Mean ±SD 43.1±3.3 29.6±7.3 0.018
Median 42.7 29.8  
Range 39.1-47.8 20.7-38.9  
Total number of gonadotropin ampoules used    
Mean ±SD 69.3±10.5 44.5±17.0 0.043
Median 71.7 36.5  
Range 50-78 30-66  
Days of stimulation    
Mean ±SD 15.2±5.6 10.7±1.6 0.068
Median 12.5 11  
Range 11-25 8-13  
Peak E 2 (pmol/L)    
Mean ±SD 3049.5±1462.6 3782.4±1642.5 0.46
Median 3596 4398.8  
Range 1158-4302 1065.0-5444.0  
Number of follicles ≥15 mm on day of hCG administration    
Mean ±SD 3.8±2.3 7.0±4.2 0.1
Median 3 8  
Range 2-8 1-11  
Number of oocytes retrieved    
Mean ±SD 10.1±6.3 8.7±6.5 0.6
Median 9.5 9  
Range 2-19 1-20  
Number of MII oocytes    
Mean ±SD 7.7±5.0 7.7±5.0 1.0
Median 7.5 8  
Range 2-14 1-16  
% MII of all oocytes retrieved    
Mean ±SD 79%±21.3 90.9±11.5 0.1
Median 74 100  
Range 50-100 76-100  
Fertilization rate (%) 71.7%±21.5 67.9±26.5%  
Median 78.6 50  
Range 50-100 44-100 0.46
Number of top-quality embryos    
Mean ±SD 1.6±2.5 1.6±1.3 0.78
Median 1 1  
Range 0-6 0-3  
% of top-quality embryos    
Mean ±SD 28.2%±29.6 37.2±23.59 0.78
Median 25.0 42.8  
Range 0-66 0-75  
Number of embryos transferred    
Mean ±SD 2.5±0.8 2.8±1.1 0.51
Median 2 3  
Range 2-4 1-4  
Number of embryos frozen    
Mean ±SD 1.8±2.0 0.8±1.6 0.28
Median 1.5 1.5  
Range 0-4 0-4