Complement sera from mouse has been used for incubation of zona-free embryos prior to microscopic examination.

Lyophilized powder from indicated amount of serum

Reconstitute in the indicated amount of ice cold deionized water. Store at -70 °C after reconstitution. Avoid repeated freezing and thawing.

Hemolytic titer (CH₅₀units per ml) is determined by the method of Kabat and Mayer. Actual titer given on the label.