A Prospective, Randomized, Controlled Clinical Trial Evaluating the Superiority of Preimplantation Genetic Screening (PGS) and Deferred Transfer of Cryopreserved Embryos Over "Freeze-Only" Deferred Transfer Without PGS or Immediate Embryo Transfer During a "Fresh" In Vitro Fertilization Cycle
试验速览
- 阶段
- 不适用
- 状态
- 终止
- 入组人数
- 32
- 试验地点
- 6
- 主要终点
- Live Birth
研究概览
简要总结
The trial objective is to determine whether the deferred transfer of embryos following cryopreservation at the blastocyst stage following pre-implantation genetic screening (PGS-FET) improves live birthrates compared to both the deferred transfer of cryopreserved embryos without PGS (FET) and immediate transfer at the conclusion of a "fresh" in vitro fertilization (IVF) cycle (Fresh). Additionally, whether "freeze-only" (FET) improves live birth rates compared to "fresh" will be determined.
详细描述
This will be a multi-center, prospective randomized clinical trial comparing three standards of care:
Group 1: PGS-FET group: deferred transfer of day 5/6/7 (blastocyst stage) embryos cryopreserved following trophectoderm biopsy Group 2: "freeze-only" (FET) group: deferred transfer of frozen/thawed embryos without biopsy Group 3: "fresh" ET group: immediate transfer of "fresh" embryos in the stimulation cycle.
1539 eligible couples will be recruited to participate. Couples will be randomized at retrieval to undergo cryopreservation with deferred embryo transfer, with or without PGS, or fresh embryo transfer during the cycle of egg retrieval. Number of embryos to transfer will be based on clinical estimation of embryo quality and will not exceed ASRM guidelines for embryo transfer number including newly revised guidelines. We are aware that the number of embryos transferred, to maintain enrollment, may not be equivalent, with likely more embryos transferred in patients not having PGS. The primary outcome of live birth/retrieval, with a secondary outcome of healthy singleton birth, may reflect the true benefit of PGS.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 42 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •Scheduled to undergo in vitro fertilization for treatment of infertility (1st or 2nd "fresh" attempt); subject can have had no more than one prior failed "fresh" IVF cycle
- •Couple able to participate in a research project
- •Able to understand study requirements
- •Willing to sign informed consent
- •Able to return for required follow-up
- •Access to telephone
- •Ability to read and write
- •Normal uterine cavity evaluation within one year of enrollment
排除标准
- •Medical conditions which may complicate treatment
- •No plans to undergo embryo transfer
- •Medical contraindication to the transfer of more than a single embryo (i.e. congenital uterine anomaly).
- •Concurrent participation in any other interventional trial
- •Recurrent pregnancy loss
- •Known chromosomal abnormality (e.g. translocation)
- •Pre-implantation genetic diagnosis requiring blastocyst biopsy
结局指标
主要结局
Live Birth
时间窗: up to 9 months or time of birth
The number of subjects who deliver a live born infant which will be calculated into a live born delivery rate.
次要结局
未报告次要终点