Does reducing gamete co-incubation time improve clinical outcomes: a retrospective study

Area of Science:

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

Background:

• Standard in vitro fertilization (IVF) protocols involve prolonged gamete co-incubation.
• The optimal duration of gamete co-incubation in IVF remains a subject of investigation.
• Exploring modifications to IVF protocols can potentially enhance treatment efficacy.

Purpose of the Study:

• To evaluate the clinical benefits of reducing gamete co-incubation time during IVF.
• To compare outcomes between a reduced incubation group (2-hour) and a standard incubation group (18-hour).
• To analyze the impact of reduced incubation time on pregnancy and miscarriage rates across different maternal age groups.

Main Methods:

• Retrospective study involving 570 patients undergoing IVF.
• Patients were divided into two groups: reduced incubation (2-hour) and standard incubation (18-hour).
• Outcomes analyzed included clinical pregnancy rate (CPR), implantation rate (IR), live birth rate (LBR), and miscarriage rate (MR), with subgroup analysis by maternal age (≤30 and >30 years).

Main Results:

• Overall CPR, IR, LBR, and MR were similar between the 2-hour and 18-hour incubation groups.
• In younger patients (≤30 years), the 2-hour group showed significantly higher rates of top-quality embryos, CPR, and IR.
• In older patients (>30 years), the 2-hour group achieved a significantly lower miscarriage rate (MR).

Conclusions:

• Reducing gamete co-incubation time in IVF can improve specific clinical outcomes, notably for younger women.
• While live birth rates did not differ significantly, reduced incubation time positively impacted clinical pregnancy rates in younger women and miscarriage rates in older women.
• The benefits of shortened gamete incubation in IVF are age-dependent, suggesting personalized approaches may be beneficial.