Choosing the best embryo by time lapse versus standard morphology

Area of Science:

• Embryology
• Reproductive Medicine
• In Vitro Fertilization (IVF)

Background:

• Continuous embryo surveillance via time-lapse incubators is a recent advancement in IVF.
• This technology enables uninterrupted embryo culture and flexible laboratory workflows.
• The core assumption is that frequent observations enhance understanding of embryo development and viability.

Purpose of the Study:

• To critically review and discuss the existing evidence supporting time-lapse monitoring in IVF.
• To evaluate the benefits of time-lapse technology compared to standard incubator methods.
• To assess the current clinical applicability and evidence base for routine use.

Main Methods:

• Review of retrospective studies correlating time-lapse parameters with embryo viability.
• Analysis of a key randomized controlled trial investigating time-lapse incubator use and embryo selection.
• Evaluation of developmental competence, aneuploidy, and clinical pregnancy outcomes.

Main Results:

• Retrospective studies indicate a link between time-lapse parameters and embryo viability.
• A significant randomized study demonstrated improved pregnancy rates using time-lapse monitoring and a specific selection model.
• This randomized study is currently the sole high-level evidence for time-lapse benefits in human embryology.

Conclusions:

• Time-lapse monitoring shows potential for improved embryo selection and clinical outcomes in IVF.
• While promising, the current evidence base, particularly from randomized trials, is still considered limited for routine clinical implementation.
• Further research and robust data are necessary to solidify the role of time-lapse technology in standard IVF practice.