促性腺激素释放激素激动剂降调节后血清抑制素B水平对体外受精-胚胎移植结局的预测价值

目的 探讨促性腺激素释放激素激动剂(GnRH-a)降调节后,血清抑制素B(INHB)对体外受精-胚胎移植(IVF-ET)中卵巢反应性和IVF-ET结局的预测价值.方法 前瞻性观察124例行IVF-ET患者.超促排卵均采用GnRH-a+重组卵泡刺激素(rFSH)+人绒毛膜促性腺激素(hCG)黄体期长方案.观察指标:年龄、基础卵泡刺激素(bFSH)水平、卵泡刺激素(FSH)与黄体生成素(LH)比值、GnRH-a降调节后INHB水平、双侧卵巢内总窦卵泡数(AFC)及双侧卵巢体积.卵巢反应性评价指标为获卵数.通过多元线性回归分析、logistic同归分析评价各激素水平与卵巢反应性及IVF-ET结局的关系,计算受试者工作特征(ROC)曲线下面积(AUC),评价INHB水平预测获卵数的准确率,通过敏感度、特异度计算并确定其诊断临界值.结果 INHB水平与AFC呈显著正相关关系(r=0.435,P<0.01);多元回归分析显示,INHB水平与bFSH水平呈显著负相关关系(r=-0.239,P<0.01),与AFC(r=0.435,P<0.01)、获卵数(r=0.861,P<0.01)呈显著正相关关系,而与年龄、FSH/LH比值、卵巢体积无相关性(P>0.05).ROC曲线分析显示,GnRH-a降调节后,INHB水平的最大AUC为0.933(95%CI为0.878～0.988),将INHB水平为15 ng/L作为临界值时,其预测卵巢反应性的敏感度为95.5%,特异度为50.0%.结论 INHB水平足预测IVF-ET中卵巢反应性的最佳指标之一,INHB水平下降是卵巢储备功能下降的早期指标,但对IVF-ET结局无预测价值.

Correlation between serum inhibin B level afar treatment with gonadotropin releasing hormone agonist and outcome of in vitro fertilization-embryo transfer

Objective To evaluate the decreased level of serum inhibin B(INHB)treated by gunadotropin releasing hormone agonist(GNRH-a)in predicting ovarian response and pregnancy in in vitro fertilization-embryo transfer(IVF-ET).Methods The prospective study enrolled 124 women given by GnRH-a+recombine follicle stimulating hormone(rFSH)+human chorionic gonadotrophin(hCG)long term stimulation protocol undergone their first cycle of IVF-ET treatment.The following predictive factors were collected and analyzed,such as age,basal level of follicle stimulating hormone(FSH),the ratio of FSH/luteinizing hormone(LH),the concentration of INHB after down-regulation,total number of antral follicle count(AFC)and mean ovarian volume. Ovarian response was evaluated by the number of oecytes obtained.A multiple regression analysis and logistic regression model were used for all possible prognostic variables to evaluate the value of difierent hormones in predicting ovariall response and pregnancy after IVF-ET.Receiver operating characteristic(ROC) analysis was used to evaluate the level of INHB in predicting the number of oocytes obtained.The sensitivity and specificity were calculated at the discriminating cut-off point Results The concentration of INHB after down-regulation showed a highly significant positive correlations with the number of oocytes obtained(r=0.435,P<0.01).The multiple regression analyses showed INHB was the most significant predictor of the number of retrieved oocytes,but INHB was not associated with IVF-ET outcome significantly(P>0.05).ROC analyses showed INHB after down-regulation had the largest area under curve(AUC)0.933(95%CI:0.878-0.988).When a threshold of 15 ng/L of INHB was established,95.5%sensitivity and 50.0% specificity in ovarian response were observed.Conclusions The level of INHB Was the best factor in predicting ovarian response in IVF-ET.Decreased level of INHB Was the early sign of ovarian reserve function failure,however,useless in predicting IVF-ET outcome.