This study is an open-label investigation of the efficacy of injection of autologous adult bone marrow derived stem cells into the ovarian stroma of patients with premature ovarian failure. Sixty women with premature ovarian failure will be recruited in this study after a written informed consent. Diagnosis will be based mainly on history taking, physical examination and investigations. Laboratory investigations will include Serum follicle-stimulating hormone (FSH), serum estrogen measurement and serum AMH. The anterior pituitary secretes FSH and LH at high levels due to the dysfunction of the ovaries and consequent low estrogen levels. Typical FSH in POF patients is over 40 mlU/ml (post-menopausal range). Subjects will be enrolled based on specific inclusion/exclusion criteria and evaluated at regular post transplant intervals. Human adult bone marrow derived stem cells will be transplanted by a gynecological surgeon through a standard surgical approach (transvaginal U/S guided approach). Subjects will be monitored frequently for a total of one year after adult bone marrow stem cells cell injection. For safety of participants, Bone Marrow Stem cells will be injected in one ovary only and the other ovary will be spared.