Monoclonal antibodies raised against position 7 of progesterone (clone 2H4), Rat IgG1. Due to their high specificity and sensitivity these antibodies may be applicable for research, diagnosis and therapeutics. A particular use may be quality control of industrial manufacturing of food products. Progesterone is a C-21 steroid hormone involved in the female menstrual cycle, pregnancy and embryogenesis of humans and other species.