Enables 17-alpha,20-alpha-dihydroxypregn-4-en-3-one dehydrogenase activity and alditol:NADP+ 1-oxidoreductase activity. Involved in several processes, including cellular response to hormone stimulus; cellular response to ketone; and female pregnancy. Acts upstream of or within progesterone metabolic process. Located in cytosol and nucleus. Biomarker of polycystic ovary syndrome and pre-eclampsia. Human ortholog(s) of this gene implicated in B-lymphoblastic leukemia/lymphoma; T-cell acute lymphoblastic leukemia; and leukemia. Orthologous to human AKR1C3 (aldo-keto reductase family 1 member C3). [provided by Alliance of Genome Resources, Apr 2022]