Fertility of Frozen-Thawed Boar Semen

Abstract

Farrowing results of six fertility tests are presented. Semen was processed by removal of seminal plasma and addition of glycerol at 30°C before (method A) or after (method B) stepwise cooling to 5°C, and by the Beltsville method (C). Sperm concentrations at freezing were 0·9 x 109/ml (A and B) and 0·6x 109/ml (C).