3beta,7beta-dihydroxy-5alpha-androstan-17-one + NADP(+) => 3beta-hydroxy-5alpha-androstane-7,17-dione + NADPH + H(+)
3beta,7beta-dihydroxy-5alpha-androstan-17-one + nadp(+) => 3beta-hydroxy-5alpha-androstane-7,17-dione + nadph + h(+)