Fertilization Check
Laboratory assessment performed 16-20 hours post-insemination to confirm successful fertilization.
Full Definition
The fertilization check is a critical laboratory procedure performed approximately 16-20 hours after insemination to determine whether oocytes have been successfully fertilized. During this assessment, embryologists examine each oocyte for the presence of two pronuclei (2PN), indicating normal fertilization, as well as the polar body. Abnormal fertilization patterns such as 1PN (parthenogenesis) or 3PN (polyspermy) are also documented. This timing is crucial because it allows for accurate assessment before the pronuclei disappear during the first mitotic division. The fertilization check results guide subsequent culture decisions and help predict cycle outcomes.
Usage
Usage note: Always specify the exact timing post-insemination when documenting results.
In Context
- "The fertilization check revealed 8 of 10 mature oocytes with normal 2PN formation." — Laboratory report
- "Fertilization check timing is critical and must occur within the 16-20 hour window." — Laboratory protocol