title: Clomiphene citrate 'stair-step' protocol vs. traditional protocol in patients with polycystic ovary syndrome: a randomized controlled trial.
abstract: OBJECTIVE
  To evaluate the efficacy of the stair-step protocol using clomiphene citrate (CC) and to assess the uterine and systemic side effects in patients with polycystic ovary syndrome (PCOS).
  
  
  METHODS
  A total of 60 PCOS patients who failed to respond to 50 mg/day for 5 days of CC treatment within the cycle were randomly allocated to the control (traditional protocol) and study (stair-step protocol) groups. In the stair-step protocol,patients were treated with CC 50 mg/day for 5 days and then in nonresponsive patients, the dosage was increased to 100 mg/day for 5 days in the same cycle. Patients who failed the 50 mg/day CC treatment in the previous cycle were stimulated with 100 mg/day CC and were accepted as the control group. Ovulation and pregnancy rates, duration of treatment and uterine and systemic side effects were evaluated.
  
  
  RESULTS
  Ovulation and pregnancy rates were similar between the stair-step and the control group (43.3 vs. 33.3 %, respectively) (16.7 vs. 10 %, respectively). The duration of treatment was significantly shorter in stair-step compared to traditional protocol (20.5 ± 2.0 vs. 48.6 ± 2.4 days, respectively). There were no significant differences in the systemic side effects between the groups. Uterine side effects were evaluated with endometrial thickness and uterine artery Doppler ultrasound; no significant differences were observed in stair-step compared to traditional protocol.
  
  
  CONCLUSIONS
  The stair-step protocol was determined to have a significantly shorter treatment period without any detrimental effect on the ovulation and pregnancy rates.
authors: Ankara Training and Research Hospital, Ankara, Turkey.
authors: Canan Dura
authors: CD
authors: Deveci
authors: Berfu
authors: B
authors: Demir
authors: Ozlem
authors: O
authors: Sengul
authors: Berna
authors: B
authors: Dilbaz
authors: Umit
authors: U
authors: Goktolga
mesh_terms: D000328:Adult; D002996:Clomiphene / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D005260:Female; D005300:Fertility Agents, Female / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D010060:Ovulation; D010062:Ovulation Induction / Q000379:methods*; D011085:Polycystic Ovary Syndrome / Q000188:drug therapy*; D011247:Pregnancy; D018873:Pregnancy Rate; D011446:Prospective Studies
chemical_list: D005300:Fertility Agents, Female; D002996:Clomiphene