[Bloodless transfer of early bovine embryos in relation to the biological properties of the materials used]. / Nekrvavý prenos raných embryí u skotu ve vztahu k biologickým vlastnostem pouzívaných materiálu.

Attention is drawn to the need of the cytotoxic testing of instruments used in the process of the transfer of early embryos. It was demonstrated by spermiotoxic test that some instruments were very toxic to bull sperm and may, analogically, threaten the life of embryos. The new catheters Foley Barum, produced by the Optimit Corporation and developed in recent time, are highly compatible with bull sperm: a slight reduction of sperm motility (by 5.7%) occurred only after 90 minutes of incubation. Teflon embryonation capillaries had a similar behaviour. The introduction of biologically compatible materials in the process of embryo transfer contributed to a substantial improvement of embryo survival: 63.01% of animals (46) got in calf after 68 bloodless transfers.