It might take 6 to 12 months to recover after Depo-Provera. It would be a good idea to have an assessment of your hormone profile (thyroid function test, prolactin, LH and FSH) and a ultrasound assessment.  If all this is normal then it is possible to induce ovulation using either clomid or FSH injections.  It is also important that your husband has a semen analysis to check everything is OK on his side before you commence any treatment.