Dairymac Superthaw Rechargeable Semen Thaw FlaskIt is very important that bull semen is thawed consistently at the right temperature. You should always contact your Semen Provider for their actual recommendations. Here are some examples: Normal semen 35 36C (95F) for 45 seconds Sexed semen 36 37C (98F) for 40 seconds If the correct settings are not followed then a percentage of sperm may die long before they ever see a cow, this has even greater consequences for sexed semen and older straws. Our