TY - JOUR TI - The Use of Letrozole for Ovulation Induction in Infertile Women with Polycystic Ovarian Syndrome AU - Aygen, E.M. AU - Güzel, Z. AU - Özgün, T. AU - Atakul, T. AU - Şahin, Y. JO - Journal of Clinical Practice and Research PY - 2007 VL - 29 SP - 195 EP - 200 DO - ER -