<strong>Background:</strong><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> Dysmenorrhea is a common symptom of gynecology that causes social and economic disruption in the lives of women who suffer from it. But many of them consider it inevitable and do not consult a health worker. Knowing the factors associated with this condition could help reduce its frequency and impact.</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><b><span style="font-family:Verdana;">Objective:</span></b></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;"> To determine the prevalence and factors asso</span><span style="font-family:Verdana;">ciated with dysmenorrhea in Benin in 2017.</span></span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><b><span style="font-family:Verdana;">Method:</span></b></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> This was a cross-sectional, </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">descriptive and analytical study from 17 April to 17 May 2017. It involved 822 women aged 15 to 44 selected by a cluster sampling technique. Information on socio-demographic characteristics, functional signs, and medical care was collected using questionnaires. The relationship between these factors and dysmenorrhea w</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">as</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> analyzed using the chi2 test. The protocol was accepted by the ethics committee for biomedical research of the Univers