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Post-embryo transfer interventions for assisted reproduction technology cycles.

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Limited evidence suggests mechanical cervical closure may improve clinical pregnancy rates after embryo transfer. However, more research is needed to confirm the effectiveness of bed rest, fibrin sealants, and cervical closure for preventing embryo expulsion during IVF/ICSI.

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Area of Science:

  • Reproductive Medicine
  • In Vitro Fertilisation (IVF)
  • Intracytoplasmic Sperm Injection (ICSI)

Background:

  • Embryo expulsion post-embryo transfer (ET) in IVF/ICSI can occur due to uterine contractions, improper deposition, or catheter removal.
  • Techniques to mitigate embryo loss after ET exist but are not universally standardized across fertility centers.

Purpose of the Study:

  • To assess the effectiveness of interventions aimed at preventing embryo expulsion following embryo transfer in women undergoing IVF and ICSI.

Main Methods:

  • Systematic review and meta-analysis of randomized controlled trials (RCTs) published up to June 2014.
  • Searched multiple databases including PubMed, MEDLINE, EMBASE, and trial registers.
  • Included four RCTs (n=1392) evaluating bed rest, fibrin sealant, and mechanical cervical closure.

Main Results:

  • Live birth rates were not reported in any included trials.
  • No significant difference in ongoing or clinical pregnancy rates was found for bed rest or fibrin sealant compared to usual care.
  • Mechanical cervical closure showed a potential increase in clinical pregnancy rates (OR 1.92), but evidence quality was very low.

Conclusions:

  • Insufficient evidence exists to recommend specific durations of bed rest or the use of fibrin sealants post-ET.
  • Very limited evidence suggests mechanical cervical closure may be beneficial, but requires further investigation.
  • High risk of bias and imprecision limit current findings; well-designed, powered studies are needed.