Sperm Capacitation
The biochemical and physiological changes sperm undergo in the female reproductive tract to become capable of fertilizing an oocyte.
Full Definition
Sperm capacitation is the final maturation process that sperm must complete before they can successfully penetrate and fertilize an oocyte. This process occurs naturally in the female reproductive tract and involves removal of proteins and cholesterol from the sperm membrane, increased membrane fluidity, and acquisition of hyperactivated motility. In assisted reproductive technology laboratories, capacitation is artificially induced through sperm preparation techniques using specialized media and incubation conditions. The capacitation process typically takes 4-6 hours and is essential for the acrosome reaction that allows sperm to penetrate the zona pellucida. Understanding capacitation is crucial for optimizing sperm preparation protocols in ART procedures.
Usage
Usage note: Distinguish from basic sperm washing or preparation procedures.
In Context
- "The sperm sample underwent capacitation using standard laboratory protocols before ICSI." — Laboratory procedure note
- "Impaired sperm capacitation may contribute to fertilization failure despite normal sperm parameters." — Medical consultation