The researchers looked at freezing boar semen collected in bulk to see if it affects sperm quality compared to semen collected from specific parts. They collected semen in bulk and from the best part, then evaluated it fresh and after freezing. They found that semen quality did not change much after freezing, regardless of whether it was from the bulk or best part of the semen. So, it's possible to freeze boar semen collected in bulk without needing to separate specific parts for freezing.