LESS Surgery Versus Conventional Multiport Laparoscopy in Ovarian Drilling

Inclusion Criteria: * PCOS according to Rotterdam Criteria (2 out of 3): * polycystic ovaries (12 or more follicles in each ovary and/or increased ovarian volume \>10 cm3). * oligo- or an-ovulation. * clinical and/or biochemical hyperandrogenisim. After exclusion of other aetiologies for irregular cycles. * Indications of laparoscopic ovarian drilling: * clomiphene citrate- resistance or failure: failure to conceive after 6 to 9 cycles. * other indications for laparoscopy. * before gonadotropin administration to decrease risk of OHSS and multiple pregnancy. * before ART to decrease risk of severe OHSS in women who previously had canceled IVF cycles due to OHSS risk or who suffered from OHSS in a previous treatment. Exclusion Criteria: * previous 2 or more laparotomies. * chronic pelvic pain, endometriosis or pelvic inflammatory diseases to avoid pelvic adhesions and bias in the quantification of postoperative pain. * High BMI (\>35kg/m2) * do not possess a native umbilicus. * advanced gynaecological surgeries or malignant disorders (TLH, ALVH, laparoscopic myomectomy). * contraindication to any laparoscopy like any medical condition worsened by pneumoperitoneum or Trendelnburg position.