Reproductive factors refer to various biological and environmental factors that influence an individual's ability to conceive and reproduce. This research area encompasses the study of factors such as age, hormones, lifestyle choices, and genetic predispositions that can impact fertility, pregnancy outcomes, and reproductive health. Researchers in this field aim to better understand how these factors interact and contribute to issues such as infertility, miscarriage, and pregnancy complications, in order to develop more effective treatments and interventions to support reproductive health and family planning.