FREEZABILITY AND FERTILITY RESULTS WITH UNCENTRIFUGED STALLION SEMEN

Citation
Ml. Heiskanen et al., FREEZABILITY AND FERTILITY RESULTS WITH UNCENTRIFUGED STALLION SEMEN, Acta veterinaria Scandinavica, 35(4), 1994, pp. 377-382
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Veterinary Sciences
ISSN journal
0044-605X
Volume
35
Issue
4
Year of publication
1994
Pages
377 - 382
Database
ISI
SICI code
0044-605X(1994)35:4<377:FAFRWU>2.0.ZU;2-T
Abstract
The first (1 to 3) sperm-rich fractions of the ejaculate were collecte d from 4 stallions using an open-ended vagina. The volume of the colle cted fractions was 12 +/- 8 ml with a density of 475 +/- 200 million s permatozoa/ml. Before freezing, the semen was diluted with a skim-milk based extender 1 : 1 to 1 : 8 (volume of semen : volume of extender), depending on the initial sperm concentration to achieve a final conce ntration of 100 million/ml. The total number of spermatozoa in an inse mination dose ranged from 0.7 to 1 billion spermatozoa. Within 12 h af ter ovulation, 48 mares were inseminated in 70 cycles. The total singl e-cycle pregnancy rate at day 21 was 24%, but varied from 10% to 33% p er cycle among the stallions.