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A Comparison of Fertility of Bovine Semen Shipped in Plastic and in Glass Containers

New York Artificial Breeders' Co-op., Inc., Ithaca, N. Y.

ABSTRACT

Disposable plastic vials have advantages over glass tubes as containers for mailing and transporting extended semen. For example, plastic vials can be machine-labeled with permanent ink, seldom if ever break during shipment, and do not require the time and labor of washing and sterilization for re-use. Many organizations routinely ship extended semen in plastic vials, although there are no reported experimental data to indicate whether or not plastic and glass containers have the same effect on fertility. The purpose of this paper is to report the fertility results of a large number of inseminations made with extended semen shipped in glass tubes and in plastic vials.¹

A field experiment was conducted at this station during May and June, 1956. Semen from 17 Holstein bulls in the routine shipping schedule was extended in 50 % yolk-citrate containing 0.3% sulfanilamide and 500 units each of streptomycin and penicillin per milliliter. The 17 bulls, collected at weekly intervals, served as whole plots in a split-plot design.