Frozen bovine semen: GK, General Studies and Current Affairs

Lambs born from oldest semen

Scientists have successfully impregnated dozens of merino sheep. The sperm used was frozen since 1968. The live birth rate is usually higher only when a semen frozen for less than 12 months is used. This impregnation proves that artificial insemination is safe with frozen semen. The semen was stored in liquid nitrogen at -196 degrees ..