The present study assessed the relationship between primary infertility and obesity in women of Delhi, India, independently, and in light of various demographic trait, lifestyle and reproductive variables. The present study was a part of a major project funded by the National Commission for Women of India, Government of India. The data were collected from 334 women, including 167 fertile and 167 infertile individuals. A two-part pretested modified quantitative interview schedule was used to collect data. The first part of the interview schedule included demographic traits, reproductive profile and lifestyle variables. The second part consisted of anthropometric measurements for BMI which were taken using an anthropometric rod (height) and digital weighing scale (weight). All the data were analysed through SPSS 22.0. The results revealed a higher prevalence of obesity and underweight among infertile women. There is a clear-cut indication that usual risk factors of obesity like physical inactivity, increasing age, higher age at marriage, and infertility-related biological issues seem to be promoting obesity in combination with infertility. Public health education is needed to increase awareness about the age at marriage. As physical inactivity leads to obesity among infertile women, counselling, awareness raising or improvement of lifestyle factors should be considered in the infertility treatment protocol.