METHODS	The intervention group ( group 1 ; n = 100 ) received intravenous infusion of 10 mL 10 % calcium gluconate in 100 mL 0.9 % saline solution on the day of ovum pick-up ( OPU ) and days 1 , 2 , and 3 after , and the placebo group ( group 2 ; n = 100 ) received 100 mL 0.9 % saline solution on the day of OPU and days 1 , 2 , and 3 after .\