Prediction of pregnancy in IVF cycles on the fourth day of ovarian stimulation

Purpose Prediction of IVF outcome on the first days of ovarian stimulation has focused clinical research for many years. The aim of this work is to predict the probability of pregnancy on the fourth day of ovarian stimulation for IVF cycle, using parameters usually determined in this stage—estradiol, antral follicle count—together with parameters determined previously: FSH on the third day of cycle and women age. Materials and methods One hundred and ten patients with primary infertility due to a tubal factor were recruited to participate in a prospective study. FSH was determined on the third day of spontaneous cycle. Antral follicles and estradiol were measured on the fourth day of ovarian stimulation. After oocyte pick-up, quality and quantity of oocytes and embryos and pregnancy rates were assessed. Results In stepwise multiple logistic regression the variables with better predictiveness over pregnancy are: antral follicles count, estradiol and woman age. The logistic regression analyses demonstrate that the capacity of the model that uses these variables to predict pregnancy is 75%, with a positive predictive value of 69% and a negative predictive value of 80%. Conclusions On the fourth day of ovarian stimulation of IVF cycles, the variables with highest predictiveness are: antral follicle count, estradiol and women age. When these variables are included in a model of prediction, the capacity to predict pregnancy is 75%. On the fourth day of ovarian stimulation for IVF cycles, antral follicles count, estradiol and woman age predict IVF outcome as reflected by quantity and quality of oocytes, embryos obtained and pregnancy rates.     

Too old for IVF: are we discriminating against older women?

In vitro fertilization (IVF) in women of advanced age (>42 years) represents only 5%, a comparatively minute part, of the national IVF experience in the United States (US). In view of evolving population dynamics, it, however, also represents proportionally a rather quickly expanding patient need. Because of access restrictions at many IVF programs, this market does not live up to its potential. As best demonstrated by the 2004 US National Summary and Fertility Clinic Report, which for the first time reported pregnancies and births above age 45 year, IVF in women of advanced reproductive age represents a cutting edge area of interest for improving current IVF outcomes. Access to IVF should, therefore, not be withheld based on female age and/or baseline FSH levels. Instead, a definition of acceptable minimal pregnancy and life birth rates could be used to define the limits of offered access to IVF, independent of age and/or baseline FSH levels.     

粒细胞集落刺激因子动员骨髓内皮祖细胞对急性肾损伤的修复作用

目的急性肾损伤(acute kidney injury,AKI)影响肾内皮细胞的结构和功能,所以内皮的修复是AKI治疗的重要靶点。观察应用粒细胞集落刺激因子(granulocyte colony stimulating factor,G-CSF)对由内毒素诱导的AKI小鼠外周血中内皮祖细胞(endothelial progenitor cells,EPCs)的数量、骨髓源性EPCs的增殖能力,以及向肾组织中归巢的影响。并观察由骨髓动员的EPCs对肾损伤的修复作用。方法健康CD-1雄性小鼠30只,随机分为假手术组(A组)、肾损伤对照组(B组)和G-CSF预处理肾损伤组(C组),每组10只。观察各组小鼠肾功能以及肾组织形态学变化、炎性因子水平、外周血中EPCs数量、肾组织细胞凋亡指数、CD34+和胎肝激酶-1(fetla liver kinase 1,FLK-1+)阳性细胞的表达。并获取小鼠骨髓,分离、培养EPCs,检测EPCs的增殖、迁移和黏附能力。结果 B组和C组小鼠肾功能受损,炎性反应、肾组织学改变前者比后者重(P<0.05);外周血EPCs含量B组比A组多,明显比C组少,肾组织CD34和FLK阳性细胞的表达B组比A组多,但少于C组(P<0.05);肾细胞凋亡指数B组最高(P<0.05);B组骨髓来源的EPCs数量比A组多,但增殖能力和迁移能力与A组比较差异无统计学意义,各指标均明显低于C组(P<0.05)。结论 G-CSF可降低AKI小鼠炎性反应的水平,有效动员骨髓来源的EPCs,并促进其增殖和迁移,增加外周血EPCs含量,对AKI小鼠肾功能起到保护作用。     

人卵巢颗粒细胞FoxO基因和卵泡刺激素受体基因的表达及相关性研究

目的：研究人卵巢颗粒细胞叉头框（forkhead box,Fox）基因和卵泡刺激素受体（follicle stimulating hormone receptor,FSHR）的表达及相关性。方法接受体外受精-胚胎移植（in vitro fertilization-embryo transfer, IVF-ET）不孕症患者126例,按照妊娠结果分为妊娠组63例,未妊娠组63例。回顾性分析取卵日成熟卵泡壁颗粒细胞 FoxO1、FoxO3a 和 FSHR mRNA 的表达,并对 FoxO1、FoxO3a、FSHR 之间及与血清促黄体生成素（luteotropic hormone,LH）、雌二醇（estradiol,E2）、孕酮（progesterone,P）进行相关性分析。结果妊娠组血清 E2水平高于未妊娠组（P＜0．01）;妊娠组优质胚胎数多于未妊娠组（P＜0．01）;2组 LH、P、获卵数差异无统计学意义（P＞0．05）。妊娠组 FoxO1 mRNA表达高于未妊娠组（P＜0．01）;2组 FoxO3a及 FSHR mRNA差异无统计学意义（P＞0．05）。FoxO1和 FoxO3a与FSHR的相关性系数分别为0．881、0．999（P＜0．01i）。结论 FoxO1和FoxO3a参与卵母细胞质量的调节,其功能与 FSHR有密切关系。     

高龄不孕症患者经自然周期排卵后继续黄体期促排的可行性分析

目的 对高龄患者经自然周期促排卵后继续黄体期促排的结果进行可行性分析.方法 收集在该院生殖中心进行体外受精-胚胎移植技术(IVF-ET)助孕的夫妇资料,分别采用经自然周期排卵后继续黄体期促排方案和常规方案,统计分析对照组和试验组基本资料和实验室各指标的差异.结果 两组的周期数、年龄、不孕年限、基础小卵泡数、基础卵泡雌激素及基础雌二醇比较差异均无统计学意义(P＞0.05);对照组的获卵数、成熟卵子数、第3天优质胚胎数、成囊率、冷冻胚胎数低于试验组,差异具有统计学意义(P＜0.05);对照组的两原核受精率略高于试验组,但二者之间差异无统计学意义(P＞0.05).结论 自然周期排卵后继续黄体期促排方案可提高高龄患者胚胎的数量和质量.     

毛囊干细胞合成β-NGF及其受体p75NTR对皮肤创伤的早期修复作用

目的以切除全层表皮为激发条件,排除表皮干细胞对创伤部位进行愈合修复的影响,同时检测在愈合修复过程中β-NGF及其受体p75NTR的表达,探讨它们对创伤愈合以及HFSC分化和迁移的可能影响。方法随机选择36只乳鼠,利用外科微创手术制作在体创伤模型,使用超薄冰冻切片和免疫组织化学技术,检测创伤修复过程中2～12 h时间点的β-NGF及其受体p75NTR对早期创伤修复作用,使用毛囊干细胞特异性标志物描述其变化。双盲半定量方法检测阳性表达强度。结果组内分析结果显示全层表皮创伤后β-NGF的变化无具有统计学意义;p75NTR的变化在2、4和6 h与其他时间点差异具有统计学意义（P〈0.05）。组间分析结果显示全层表皮创伤后β-NGF与对照组相比在2～12 h差异统计学意义（P〉0.05）;p75NTR与对照组相比在4 h差异具有统计学意义（P〈0.05）。干细胞标志物β1-integrin,CD34和K15无明显变化,但是在12h时间点有下降趋势。结论β-NGF与p75NTR的表达不一致性体现在4h,提示p75NTR可能参与创伤发生时规律性的变化。毛囊干细胞SC特异性标志物β1-integrin、CD34和K15的降低提示毛囊干细胞可能在这一时期开始发生转变。     

补肾除湿方治疗卵巢储备功能低下临床研究

目的:观察自拟补肾除湿方治疗卵巢储备功能低下的临床疗效。方法:136例卵巢储备功能低下患者随机分为观察组(黄芪、菟丝子、陈皮等)68例、对照组(戊酸雌二醇片+黄体酮胶丸)68例,治疗3个月后,比较各组治疗前后性激素变化及临床疗效。结果:观察组治疗前后卵泡刺激素(follicle-stimulating hormone,FSH)、黄体生成素(luteinizing hormone,LH)、雌二醇(estradiol,E2)、FSH/LH比较,差异均有统计学意义(P0.01);对照组治疗前后FSH、E2、FSH/LH比较,差异均有统计学意义(P0.01);观察组FSH、FSH/LH、LH、E2及临床疗效改善与对照组比较,差异均有统计学意义(P0.05)。结论:自拟补肾除湿方治疗卵巢储备功能低下临床疗效显著。     

分化抑制因子Id3对雌性生育能力的研究

目的：通过构建ID3-Gdf9-Cre+的条件性敲除小鼠对雌性小鼠的表型进行研究,从而进一步确定分化抑制因子Id3对雌性生育能力的影响。方法：我们利用配繁出的ID3-Gdf9-Cre+的条件性敲除小鼠,通过HE染色、卵泡计数条件性敲除小鼠卵巢中的卵泡发育的情况进行检测,通过卵母细胞体外成熟实验和体外超排实验对卵母细胞的体外成熟进行检测,通过交配实验对生育力进行检测。结果：通过RT-pcr、WB的结果显示出我们成功在卵母细胞中对ID3进行了敲除;对3W、8W小鼠卵巢进行HE染色并对各级卵泡进行计数,结果表明条敲小鼠中各级卵泡发育正常;通过卵母细胞体外成熟以及体外超排实验显示了条敲小鼠中卵母细胞体外成熟正常;结论：在正常饲养条件下,条件性敲除ID3不影响正常卵泡的发育以及雌性小鼠的生育力。