Received February 20, 2019
Accepted September 07, 2019

Objective: The goal of this study was to examine the association between the BMI and the possibility of conceiving a child through an assisted reproduction treatment. Methodology: A study of cases and controls matched by age was done, with 394 patients that underwent treatment at GESTAR (assisted reproduction center), between the 2013-2017. The association between the BMI and the possibility of conceiving a child was analyzed through logistic regression. Results: Amongst the cases (successful treatments) 14% were obese, while in the control group (patients that did not get pregnant) obesity was 21%. A significant difference (P<0,01) was seen in the BMI, the number of recovered oocytes, normally fertilized oocytes and the number of transferred embryos. The Odds Ratio (OR) in SPSS was equal to 0,26 ± (0,14, 0,50) IC95%, which indicates that conceiving a child by assisted reproduction is 74 times lower in patients that are obese that in patients not obese (P<0,001). And the Odds Ratio (OR) calculated by logistic regression in Stata 11 was 0,80 ± (0,76, 0,86) IC95% which indicates a 20% decrease in possibility of conceiving for each point on the BMI scale. Conclusion: Obesity is associated to the diminishment of the possibility of conceiving a child through assisted reproduction technologies.