罗格列酮和二甲双胍治疗胰岛素抵抗多囊卵巢综合征的临床研究

目的　探讨罗格列酮 (rosiglitazone)和二甲双胍 (metformin)分别对有胰岛素抵抗的多囊卵巢综合征(polycysticovarysyndrome,PCOS)患者促排卵治疗的疗效对比。 方法　选择 2 0 0 2年 2月至 2 0 0 3年 6月存在胰岛素抵抗的PCOS患者 94例 ,将其随机分为A、B、C 3组。A组 36例口服罗格列酮联合克罗米芬治疗 ;B组 30例口服二甲双胍联合克罗米芬 (clomiphenecitrate ,CC)治疗 ;C组 2 8例口服克罗米芬治疗。 3组用药时间均为 3个月经周期。比较 3组用药后的胰岛素抵抗指数 (homainsulin resistance ,HomaIR)变化和排卵的发生情况。结果　A组用药 2个月后HomaIR开始由 1 12± 0 4 9下降为 0 86± 0 4 2 ,用药 3个月HomaIR由 1 12± 0 4 9降为0 6 1± 0 36 ,两者比较差异有显著性意义 (P <0 0 5 ) ;B组用药 2个月后HomaIR无明显下降 ,用药 3个月HomaIR由 1 15± 0 5 2降为 0 83± 0 32 ,两者比较差异有显著性意义 (P <0 0 5 )。C组用药前后HomaIR无变化。治疗后 3个月排卵率A组为 76 9% ,明显优于B组的 6 6 8%和C组的 5 8 8% ,差异有显著性意义 (P <0 0 5 )。结论　罗格列酮比二甲双胍能更快更好地改善PCOS的胰岛素抵抗 ,提高促排卵成功率。     

罗格列酮联合二甲双胍治疗多囊卵巢综合征的临床疗效观察

目的 :探讨罗格列酮联合二甲双胍治疗多囊卵巢综合征 (PCOS)的临床疗效。方法 :10 0例临床上有PCOS表现的肥胖不育患者通过口服葡萄糖耐量试验 (OGTT)、胰岛素及C肽释放试验 ,检出胰岛素抵抗 (IR)患者 80例 ,随机分为A、B、C 3组 ,分别给予促排卵药 ,促排卵药加二甲双胍 ,促排卵药加二甲双胍加罗格列酮 ,共治疗 2个月经周期 ,比较 3组用药前后及 3组间体重指数 (BMI)、胰岛素抵抗指数 (HomaIR)、游离脂肪酸(FFA)、肿瘤坏死因子α(TNFα)、纤溶酶原激活抑制物 1(PAI 1)和排卵率的变化。结果 :C组患者治疗后的BMI、HomaIR、FFA、TNFα、PAI 1较治疗前明显下降 (P <0 .0 5 )。C组的排卵率明显优于A组 (P <0 .0 1)和B组 (P <0 .0 5 )。结论 :罗格列酮联合二甲双胍治疗PCOS效果显著。     

罗格列酮用于多囊卵巢综合征患者促排卵周期的疗效观察

目的：探讨罗格列酮对多囊卵巢综合征有胰岛素抵抗(IR)患者促排卵治疗的效果。方法：将2001年6月至2002年6月81例患者随机分为A、B、C三组，分别给予促排卵药、罗格列酮、罗格列酮与促排卵药合用，比较三组用药前后胰岛素抵抗指数(Homa IR)、游离脂肪酸(FFA)、肿瘤坏死因子(TNFα)和排卵率的变化。结果：罗格列酮治疗前后患者Homa IR指数、血清FFA和TNFα明显下降(P＜0．05)。C组排印卑明显化于A组(P＜0．05)和B组(P＜0．005)。结论：罗格列酮能有效地改善胰岛素抵抗，提高排卵率。     

二甲双胍联合枸橼酸氯米芬治疗多囊卵巢综合征伴胰岛素抵抗患者的疗效观察

目的　探讨二甲双胍联合枸橼酸氯米芬治疗多囊卵巢综合征 (PCOS)胰岛素抵抗性不孕症的疗效及二甲双胍对PCOS胰岛素抵抗伴假性黑棘皮病的治疗效果。方法　将 70例PCOS胰岛素抵抗性不孕症患者 (A组 ) ,按治疗方法不同分为Aa组、Ab组各 2 0例 ,Ac组 30例。Ac组口服二甲双胍 ,每日 3次 ,每次 5 0 0mg ,连用 3个月 ,从月经周期或撤退性出血第 5天开始口服枸橼酸氯米芬片 ,每日 1次 ,每次 5 0mg,连服 5d ,共用 3个周期 ;Aa组单用二甲双胍 ,Ab组单用枸橼酸氯米芬 ,Aa及Ab两组的用药方法分别同Ac组中二甲双胍和枸橼酸氯米芬的用法。 30例PCOS伴假性黑棘皮病和胰岛素抵抗的患者为B组 ,口服二甲双胍片治疗 3个月 ,用法同Aa组 ,观察各组患者治疗前后体重指数、腰臀比例、空腹胰岛素、空腹血糖、血浆胆固醇、甘油三酯、性激素 (卵泡刺激素、黄体生成素、催乳素、雌二醇、孕酮、睾酮 )水平的变化及B组的皮损变化。结果　 (1)Ac组治疗后胰岛素抵抗状态明显改善 ,妊娠率达 5 7% ,明显高于Aa组 (2 0 % )和Ab组 (15 % ) ,差异有极显著性 (P <0 0 1) ;Ac组治疗前 ,空腹胰岛素、体重指数、睾酮、血浆胆固醇、甘油三酯分别为 (4 9 7± 6 4 )mU/L、2 9 4± 2 2、(6 4± 2 2 )nmol/L、(6 3± 0 5 )mmol/L、(4 1± 1 0     

达英-35与胰岛素增敏剂治疗多囊卵巢综合征后促排卵药物的效果观察

目的:探讨比较单独应用达英-35以及达英-35分别与二甲双胍、罗格列酮联合治疗多囊卵巢综合征(PCOS)伴有胰岛素抵抗(IR)不孕患者效果及促排卵结局的差异.方法:97例PCOS伴有IR不孕患者随机分成3组.A组(单独应用达英-35)35例,B组(达英-35和二甲双胍)32例,C组(达英-35和罗格列酮)30例,3组患者治疗3个周期后均促排卵.比较用药后对体重、WHR、BMI、糖代谢、性激素及促排卵结局的影响.结果:3组患者治疗后血清睾酮较治疗前明显降低,B组、c组患者空腹胰岛素,胰岛素抵抗指数等显著下降;治疗后B组、C组妊娠率较A组增高,周期取消率、OHSS发生率较A组降低,差异均有统计学意义.结论:PCOS伴有IR不孕患者应用达英-35联合胰岛素增敏剂(二甲双胍及罗格列酮),可以明显改善内分泌、代谢紊乱,在此基础上促排卵,可以明显提高妊娠率.但因罗格列酮的用药安全性问题及价格较贵,所以此类患者应首选二甲双胍治疗.     

复方醋酸环丙孕酮和罗格列酮序贯用药对氯米芬抵抗的多囊卵巢综合征患者内分泌及生育功能的影响

目的探讨复方醋酸环丙孕酮和罗格列酮序贯用药对改善多囊卵巢综合征（PCOS）患者生育功能的临床疗效。方法30例氯米芬抵抗的PCOS胰岛素抵抗患者，口服复方醋酸环丙孕酮3个月后，罗格列酮联合氯米芬用药6个月，比较用药前后体重指数、月经周期、生殖激素水平、排卵率、妊娠率、血糖和胰岛素水平的变化。结果与用药前相比，服用复方醋酸环丙孕酮后，雄激素水平和LH／FSH值明显降低（P〈0．05），服用罗格列酮后，胰岛素抵抗指数（Homa IR）、胰岛素分泌指数（Homa β）以及β细胞功能评定指数（MBCI）均较用药前降低（P〈0．05）。结论复方醋酸环丙孕酮和罗格列酮序贯用药可有效地抑制氯米芬抵抗的PCOS患者的高雄激素血症，改善胰岛素抵抗及生育功能。     

二甲双胍/CC/HMG序贯用药治疗胰岛素抵抗PCOS患者的临床研究

目的 :探讨二甲双胍对胰岛素抵抗多囊卵巢综合征 (PCOS)患者的治疗效果及作用机理。方法 :随机将 69例胰岛素抵抗PCOS患者分为A、B两组。A组 34例用Diane 35治疗 3个周期后用CC +HMG促排卵 ;B组 35例用二甲双胍治疗 3个月后用CC +HMG促排卵。观察两组患者治疗前后的BMI、T、FINS、TNF α及排卵率。结果 :两组患者治疗后BMI及T差异无显著性(P >0 .0 5) ;FINS、TNF α及排卵率差异有显著性 (P <0 .0 5)。结论 :胰岛素抵抗PCOS患者治疗的关键是应用胰岛素增敏剂降低FINS ,二甲双胍对于PCOS合并不孕的治疗效果优于Diane 35。     

二甲双胍在多囊卵巢综合征促排卵治疗中的作用

目的　评估二甲双胍在多囊卵巢综合征 (PCOS)患者促排卵治疗中的作用。方法　以40例PCOS患者 (PCOS组 )为研究对象 ,其中 2 0例口服二甲双胍治疗 12周 ,治疗后 17例未孕者加用高纯度促卵泡激素 (FSH HP)治疗 1个周期 (A组 ) ,另 2 0例单用FSH HP治疗 1个周期 (B组 ) ;同时 ,以体重和月经周期均正常的 2 0例门诊患者为对照组。观察各组及A组患者口服二甲双胍前后血清FSH、黄体生成激素 (LH)、睾酮、瘦素、空腹血糖及空腹胰岛素水平 ;比较A、B两组促排卵治疗结果。结果　空腹胰岛素和瘦素水平 ,PCOS组显著高于对照组 (P <0 .0 5) ,PCOS肥胖者高于PCOS非肥胖者(P <0 .0 5) ,但PCOS非肥胖者与对照组相比 ,差异无显著性 (P >0 .0 5)。二甲双胍治疗后 ,LH、空腹胰岛素、睾酮及瘦素水平明显下降 (P <0 .0 5～ 0 .0 1)。PCOS组患者中有 3例服二甲双胍治疗期间妊娠 ,另外 3 7例行FSH HP促排卵治疗后有 7例妊娠 (A组 4例 ,B组 3例 ) ,总妊娠率为 19% ( 7 3 7) ;A组的排卵率 ( 88% ,15 17)和妊娠率 ( 2 4% ,4 17)虽高于B组 ( 70 % ,14 2 0 ;15% ,3 2 0 ) ,但差异无显著性 (P >0 .0 5)。结论　二甲双胍能降低胰岛素和瘦素水平 ,逆转PCOS患者性激素异常 ,使部分患者恢复排卵和妊娠 ,可增强PCOS患者对促性腺素的敏感     

罗格列酮和二甲双胍治疗多囊卵巢综合征患者的临床疗效比较

目的:比较罗格列酮和二甲双胍治疗多囊卵巢综合征的临床疗效。方法:80例氯米芬抵抗的多囊卵巢综合征患者,随机分为罗格列酮组40例和二甲双胍组40例,疗程为6个月,比较两组用药前、后体重指数、月经周期、生殖激素水平、排卵率、妊娠率、血糖和胰岛素水平的变化。结果:①罗格列酮和二甲双胍均可降低血LH/FSH比值和雄激素水平(P<0.05),恢复卵巢排卵功能;②罗格列酮可降低HomaIR指数和Homaβ指数(P<0.05),二甲双胍降低BMI评分(P<0.05)。结论:罗格列酮和二甲双胍均可改善氯米芬抵抗的多囊卵巢综合征患者生育功能;但罗格列酮改善胰岛素抵抗优于二甲双胍,而降低体重作用二甲双胍优于罗格列酮。     

不同胰岛素增敏剂对多囊卵巢综合征代谢异常的疗效比较

目的:比较二甲双胍与罗格列酮治疗多囊卵巢综合征(PCOS)内分泌、代谢异常的疗效。方法:将89例PCOS患者分成A、B两组,A组予二甲双胍,B组予罗格列酮,均连用6个月。观察患者用药前后的体重、生殖激素、血糖和胰岛素水平的变化。结果:用药6月A组患者体重下降,B组体重上升,两组LH、LH/FSH、T均下降,治疗前后比较差异有显著性(P<0.05);B组T的下降幅度比A组明显(P<0.05)。A、B组空腹胰岛素(FINS)、餐后2小时胰岛素、胰岛素抵抗指数(Homa IR)均下降,治疗前后比较差异有显著性(P<0.05)。FINS、2小时INS以及Homa IR下降程度均表现为:罗格列酮>二甲双胍(P<0.05)。结论:罗格列酮比二甲双胍更能改善PCOS患者的胰岛素抵抗,而且无胃肠副反应,但价格较贵、起效较慢和引起体重增加,而二甲双胍有减轻体重的作用。     

Effect of rosiglitazone on spontaneous and clomiphene citrate-induced ovulation in women with polycystic ovary syndrome

OBJECTIVE: In women suffering from polycystic ovary syndrome (PCOS), correction of hyperinsulinemia results enhances spontaneous ovulation or alternatively, the responsiveness to ovulation induction agents such as clomiphene citrate (CC). We investigated the effect of rosiglitazone maleate on ovulation induction in overweight and obese, CC-resistant women with PCOS. DESIGN: Double-blind, randomized, placebo-controlled trial. SETTING: Academic reproductive endocrinology clinic. PATIENT(S): Overweight and obese women with clinical and laboratory manifestations of PCOS who desired pregnancy and were resistant to CC. INTERVENTION(S): Twenty-five women were randomized into two treatment groups. Subjects in Group I (n = 12) were randomized to receive rosiglitazone 4 mg b.i.d. with a placebo on cycle days 5-9. Group II (n = 13) was randomized to receive rosiglitazone 4 mg b.i.d. with CC on cycle days 5-9. The duration of the study was 2 months. MAIN OUTCOME MEASURE(S): The primary outcome was ovulation as defined by luteal serum progesterone greater than 5 ng/dL assessed on days 21, 24, and 28 of the cycle. Secondary outcomes were pregnancy and changes in insulin sensitivity, serum lipoproteins, and androgens. RESULT(S): Overall, 14 of 25 (56%) women, who were previously resistant to CC, successfully ovulated. In subjects taking rosiglitazone alone (Group I), 4 of 12 (33%) subjects ovulated compared with 10 of 13 (77%) women randomized to rosiglitazone with CC (Group II) (P=.04, Fisher's exact). One subject in Group I became pregnant, resulting in one uncomplicated live birth; two subjects in Group II conceived, with one successful live birth and one first trimester, spontaneous abortion. For all subjects, fasting insulin declined from 29.4 +/- 13.8 microU/mL to 17.3 +/- 7.8 microU/mL after rosiglitazone (P=.003, paired t-test). Although mean levels of total testosterone (T) and dehydroepiandrosterone sulfate (DHEAS) did not decline significantly, sex hormone-binding globulin (SHBG) did increase from 0.7 +/- 0.3 microg/dL to 1.0 +/- 0.3 microg/dL after rosiglitazone therapy (P=.001, paired t test). There was also a decrease in luteinizing hormone (LH) from 9.4 +/- 6.3 mU/mL to 7.2 +/- 3.7 mU/mL (P=.01). Lipoproteins including total cholesterol, low-density lipoprotein (LDL), high-density lipoprotein (HDL), and triglycerides did not change. CONCLUSIONS: Short-term rosiglitazone therapy enhances both spontaneous and clomiphene-induced ovulation in overweight and obese women with PCOS. Rosiglitazone therapy improves insulin sensitivity and decreases hyperandrogenemia primarily through increases in SHBG.     

Management of anovulatory infertility associated with polycystic ovary syndrome: tamoxifen citrate an effective alternative compound to clomiphene citrate.

Clomiphene citrate (CC) is widely used as first-line treatment for ovulation induction in anovulatory women with polycystic ovary syndrome (PCOS). Tamoxifen citrate (TMX), another non-steroidal selective estrogen receptor modulator, may also be effective on the resumption of ovulation in these women. The aim of this controlled observational study was to compare the efficacy and safety of ovulation induction with TMX versus CC in anovulatory infertile women with PCOS. A total of 102 consecutive women (mean age+/-SD: 31+/-3.6 years; range: 26-38) with PCOS were studied. Following a spontaneous or progesterone-induced withdrawal bleed, women received either 50 mg daily of CC (days 2-6) or 20 mg daily of TMX (days 2-5). In case ovulation failed to occur, the dose was sequentially increased to 100 mg daily of CC and 40 mg daily of TMX, respectively. Serum progesterone levels were measured on cycle day 21 to monitor the ovulation pattern. The overall ovulation rate was significantly higher in women who received TMX compared with those who received CC (61/98, 62.2% vs. 60/127, 47.2%, p=0.03). Although not statistically significant, the pregnancy rate per ovulatory cycle was higher in the TMX group compared to the CC group (14/61, 22.9% vs. 11/60, 18.3%, respectively). All pregnancies were single and there were no side-effects in either group of treatment. Collectively, these data demonstrate that TMX is a safe and effective agent, and a suitable alternative to CC for anovulatory infertility in women with PCOS.     

罗格列酮对多囊卵巢综合征胰岛素抵抗及高雄激素血症的治疗研究

目的　探讨胰岛素增敏剂罗格列酮对多囊卵巢综合征 (PCOS)的胰岛素抵抗及高雄激素血症的治疗效果。方法　对 30例PCOS患者给予每天早餐前口服 4mg罗格列酮 ,共 1 2周 ,比较治疗前后体重指数、胰岛素、血糖和血脂、瘦素和神经肽Y以及生殖激素水平与排卵率的变化。结果治疗 1 2周后 ,基础胰岛素水平从 (1 8± 8)mIU/L降至 (1 2± 7)mIU/L(P <0 0 1 ) ,胰岛素抵抗指数从4 3± 1 2降至 2 6± 0 7(P <0 0 1 )。黄体生成素从 (1 5 4± 4 4)U/L降至 (7 9± 2 1 )U/L ,游离睾酮从(1 2 5± 1 9)pmol/L降至 (8 9± 1 4)pmol/L ,雄烯二酮从 (9 8± 1 7)nmol/L降至 (7 4± 1 2 )nmol/L ,差异均有极显著性 (P均 <0 0 1 ) ;硫酸脱氢表雄酮从 (8 7± 3 5) μmol/L降至 (6 9± 2 1 ) μmol/L(P<0 0 5) ;性激素结合球蛋白从 (39± 3)nmol/L升至 (58± 5)nmol/L(P <0 0 1 )。血浆瘦素水平从 (1 8±4) μg/L降至 (1 3± 3) μg/L(P <0 0 1 )。 30例月经稀发的患者 ,2 5例恢复排卵 ,排卵率 50 %。 结论　罗格列酮可降低PCOS患者血浆瘦素水平 ,改善胰岛素敏感性 ,进而改善高雄激素血症等内分泌紊乱 ,恢复有排卵月经     

Management of women with polycystic ovary syndrome who experienced premature luteinization during clomiphene citrate treatment

OBJECTIVE: To determine the preferred treatment modality in patients with PCOS who experienced premature luteinization during CC treatment. DESIGN: Prospective randomized study. SETTING: Tertiary medical center. PATIENTS: Twenty-two infertile women with PCOS demonstrating premature luteinization during at least two consecutive CC cycles. INTERVENTIONS: Randomized induction of ovulation either with FSH alone or with GnRH agonist combined with FSH for a single treatment cycle. MAIN OUTCOME MEASURES: Premature luteinization was defined as serum progesterone >1.5 ng/mL before hCG administration. RESULTS: Premature luteinization occurred in eight of the 10 patients (80%) in group A and in two of the 12 patients in group B (16.6%). This result corresponds to the higher mean (+/-SD) progesterone level present in group A patients as compared to those in group B (2.0 +/- 1.2 ng/mL vs. 1.2 +/- 0.6 ng/mL, P=0.03). No pregnancies were achieved in group A, whereas the pregnancy rate per cycle observed in group B was 33.3% (4/12). On the day of hCG administration, the maximum mean (+/-SD) estradiol level was significantly lower (P<0.0001) in group A (210.6 +/- 37.9 pg/mL) than in group B (600.3 +/- 253.8 pg/mL). The treatment duration and the number of FSH ampules used did not differ between the groups.Conclusions: Pituitary desensitization with GnRH analog in combination with FSH is superior to FSH-only treatment in PCOS patients who demonstrate premature luteinization during CC treatment.     

Effects of metformin on insulin resistance, androgen concentration, ovulation and pregnancy rates in women with polycystic ovary syndrome following laparoscopic ovarian drilling

AIM: To evaluate the effects of metformin on insulin resistance, androgen concentration, ovulation rates and pregnancy rates in infertile women with polycystic ovary syndrome (PCOS). METHODS: Forty-two infertile women with PCOS were selected in this randomized clinical study. Basal steroid and gonadotropin levels were measured, and oral glucose tolerance test (OGTT) was performed. The patients were randomly divided into group 1 (n = 21) and group 2 (n = 21). Group 1 patients were treated with laparoscopic ovarian drilling (LOD). Group 2 patients underwent laparoscopic ovarian drilling (LOD) and received 1700 mg per day of metformin for 6 months. LOD was performed in women with PCOS using a unipolar electrode. Serum progesterone (P) level > 5 ng/mL was considered as a confirmation of ovulation. Ovulation and pregnancy rates were determined after six cycles. RESULTS: Serum androgens and insulin response to OGTT decreased significantly after metformin therapy. Mean serum P levels and endometrial thickness were significantly higher in cycles treated with metformin plus LOD (34.6 +/- 25.4 ng/mL, 8.4 +/- 1.1 mm) than in those treated with LOD alone (26.2 +/- 24.7 ng/mL, 7.9 +/- 2.8 mm) (P < 0.05). The ovulation (56 of 65 cycles, 86.1% vs 29 of 65 cycles, 44.6%) and pregnancy rates (nine of 21 women, 47.6% vs four of 21 women, 19.1%) were significantly higher in group 2 than in group I. CONCLUSIONS: Metformin improves insulin resistance, reduces androgen levels and significantly increases the ovulation and pregnancy rates in infertile women, following LOD.     

Effects of metformin and rosiglitazone, alone and in combination, in nonobese women with polycystic ovary syndrome and normal indices of insulin sensitivity

OBJECTIVE: To determine whether insulin-sensitizing drugs would improve ovulation and T levels in women with polycystic ovary syndrome (PCOS), without clinical or biochemical criteria indicating insulin resistance and whether the combination of two distinct insulin-sensitizing drugs would be of any benefit over either drug alone. DESIGN: Randomized controlled double-blind trial. SETTING: A referral center in Caracas, Venezuela. PATIENT(S): One hundred twenty-eight nonobese PCOS women with normal indices of insulin sensitivity-that is, normal glucose tolerance, fasting insulin, peak insulin during an oral glucose tolerance test (OGTT), and fasting glucose-to-insulin ratio. Twenty-eight women were lost to follow-up initially and did not receive any intervention. INTERVENTION(S): One hundred women received twice daily one of the following for 6 months: metformin (850 mg), rosiglitazone (4 mg), combination of both drugs, or at least one placebo. MAIN OUTCOME MEASURE(S): Frequencies of ovulation and serum free T after 6 months. RESULT(S): Frequencies of ovulation were higher after treatment with an insulin-sensitizing drug (ovulations per subject in 6 months: metformin, 3.3; rosiglitazone, 2.4; and combination, 3.4) than with placebo (0.4). Ovulatory frequencies increased significantly more with metformin than rosiglitazone, and the combination was not more potent. After treatment, serum free-T levels were comparable among all active treatment groups (metformin: 2.34 pg/mL, rosiglitazone: 3.06 pg/mL, and combination: 2.39 pg/mL) and were significantly lower than in the placebo group (7.26 pg/mL). Compared with placebo, fasting insulin levels, area under the insulin curve during OGTT, the homeostatic model assessment of insulin sensitivity, and OGTT-derived insulin sensitivity index improved significantly after metformin or combination therapies but not after rosiglitazone. CONCLUSION(S): These findings suggest that insulin-sensitizing drugs increase ovulatory frequency and ameliorate hyperandrogenemia, even in nonobese women with PCOS who appear to have normal insulin sensitivity.     

Risk of multiple gestation after ovulation induction in polycystic ovary syndrome

OBJECTIVE: To compare the incidence of multiple gestation following treatment with clomiphene citrate (CC), metformin (MET) or gonadotropins in polycystic ovary syndrome (PCOS) patients undergoing ovulation induction. STUDY DESIGN: This was a retrospective, cohort study performed in an academic reproductive endocrine practice. PCOS patients presenting for first-trimester ultrasound were identified and assigned to 1 of 3 groups: CC-resistant patients who conceived after use of metformin +/- CC (group A), CC-resistant patients who conceived after gonadotropins (group B) and PCOS patients who conceived with CC only (group C). Multiple pregnancy outcome data were collected by chart review and patient interview. RESULTS: One hundred one pregnancies were identified in PCOS patients who had conceived after ovulation induction (OI). The rate of multiple gestation was higher in group B (36%) than in A (0%) or C (11%). CONCLUSION: The rate of multiple births was significantly lower with MET use during OI. Because multiple gestation is associated with higher complication rates and medical costs, our data offer an additional reason for use of MET for OI in PCOS patients who fail CC.     

Comparison of letrozole with continuous gonadotropins and clomiphene-gonadotropin combination for ovulation induction in 1387 PCOS women after clomiphene citrate failure: a randomized prospective clinical trial

Purpose  Letrozole, though reported to be an effective ovulation inducing agent, warrants larger randomized trials. The purpose of this study is to compare the efficacy of letrozole with that of rFSH and clomiphene citrate(CC)/rFSH for ovarian stimulation in IUI cycles. Methods  Randomized, prospective, single-blinded clinical trial. 1387 PCOS women after CC failure were randomized into three groups: Group A received letrozole, Group B received CC with two doses rFSH and Group C received continuous rFSH day 2 onwards until hCG injection. Results  Group A, B and C had an ovulation rate of 79.30%, 56.95% and 89.89% and cycle cancellation rate of 20.70%, 43.05% and 10.11%, respectively. Pregnancy rates in Group A, B and C were 23.39%, 14.35% and 17.92%, while the miscarriage rates were 13.80%, 16.67% and 14.52%, respectively. Conclusion  Letrozole appears to be a suitable ovulation inducing agent in PCOS women with CC failure and is found to be most effective when baseline estradiol level >60 pg/ml. Capsule Letrozole appears to be an effective ovulation inducing agent as compared to clomiphene-rFSH and continuous rFSH protocols in PCOS women after clomiphene citrate failure.