Does a Large (>24 mm) Follicle Yield a Competent Oocyte/Embryo?

Area of Science:

• Reproductive Endocrinology
• Assisted Reproductive Technology

Background:

• Follicular size is a key indicator in oocyte retrieval.
• Understanding the impact of large follicles (≥24 mm) on outcomes is crucial for optimizing fertility treatments.

Purpose of the Study:

• To evaluate the effect of large follicular size (≥24 mm) on oocyte and embryo quality during oocyte retrieval.

Main Methods:

• A cohort study compared follicles ≥24 mm (large) to <24 mm (normal) at oocyte retrieval.
• Follicular aspirates were microscopically examined for oocyte maturation, fertilization, and embryo quality.

Main Results:

• Oocyte recovery rate was nonsignificantly lower in the large follicle group (64.4%) compared to the normal group (75.5%).
• No significant differences were observed in mature oocyte (MII) or fertilization rates between groups.
• A trend towards a higher top-quality embryo (TQE) rate per zygote (2PN) was noted in the large follicle group (84.2% vs. 67.3%).

Conclusions:

• Follicles ≥24 mm may yield comparable zygote and top-quality embryo rates per follicle.
• While oocyte recovery might be slightly reduced, large follicles do not appear to compromise overall embryo quality in assisted reproductive technology.