+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Recovery rate and quality of embryos from mares inseminated after ovulation

Recovery rate and quality of embryos from mares inseminated after ovulation

Theriogenology 45(4): 719-726

The aim of this study was to evaluate the quality of embryos and their recovery rate from mares inseminated at different intervals after ovulation. Finnhorse and warmblood mares were inseminated with fresh semen 8 to 16 h, 16 to 24 h, or 24 to 32 h after ovulation. Control mares were inseminated before ovulation. Sixty-seven embryo flushings were performed between Days 7 and 9 after ovulation/insemination. Thirteen mares were not flushed, but their uteri were scanned for pregnancy on Days 14 to 16. Embryo recovery rates decreased as time from ovulation to insemination increased, although embryo quality remained normal as evaluated by morphological criteria and mitotic index. However, postovulatory insemination in this trial appeared to delay embryo development, since the embryos recovered from mares inseminated after ovulation were appreciably smaller and at an earlier stage of development than control embryos recovered from mares inseminated prior to ovulation. Part of this delay in embryo development in the postovulation group could be due to the time needed for sperm capacitation. In addition, as the time from ovulation to insemination increased, embryo development might have been further delayed by defects in the aging oocyte.

(PDF emailed within 0-6 h: $19.90)

Accession: 002939365

Download citation: RISBibTeXText

PMID: 16727834

DOI: 10.1016/0093-691x(96)00001-5

Related references

Recovery rate and quality of embryos from mares inseminated at the first post-partum oestrus. Acta Veterinaria Scandinavica 37(3): 343-350, 1996

Recovery of embryos from mares inseminated with cryopreserved stallion spermatozoa. Theriogenology 43(1): 351, 1995

Influence of ovulation rate on recovery and quality of embryos in crossbred cattle. Indian Journal of Dairy Science 48(1): 72-74, 1995

Relationship of ovulation rate with ova/embryos recovery and embryo quality in crossbred cows. Indian Journal of Animal Sciences 70(1): 45, 2000

Effects of hormone treatments, season, age and type of mares on ovulation, twinning and pregnancy rates of mares inseminated with fresh and frozen semen. Pferdeheilkunde 19(6): 619-624, 2003

Effect of administration of phenylbutazone or progesterone on recovery of embryos from the uterus of mares 5 days after ovulation. American Journal of Veterinary Research 52(5): 678-681, 1991

Incidence of embryo loss in mares inseminated before or after ovulation. Equine Veterinary Education 11(5): 251-254, 1999

Fertility of mares inseminated at different times during ovulation with diluted semen, cooled to 20 degrees C and transported. Arquivos da Escola de Medicina Veterinaria da Universidade Federal da Bahia 18(1): 79-88, 1996

Effect of the interval between insemination and ovulation on fertility in mares inseminated with cooled, transported semen. Arquivo Brasileiro de Medicina Veterinaria e Zootecnia 50(5): 563-568, 1998

Effects of AI-ovulation intervals on fertility of inseminated mares with diluted, cooling and transported semen. Arquivo Brasileiro de Medicina Veterinaria e Zootecnia 50(5): 563-568, 1998

Success rate for non-surgical recovery of horse embryos between 144 and 168 h after ovulation. 24 Journee de la Recherche Equine: 4 mars 1998: 13-24, 1998

Pregnancy rate in mares artificially inseminated with frozen semen. Lucrari Stiintifice Universitatea de Stiinte Agronomice si Medicina Veterinara Bucuresti Seria C, Medicina Veterinara 40: 247-255, 2006

Human chorionic gonadotropin (hCG): the effect of dose on ovulation and pregnancy rate in Thoroughbred mares experiencing their first ovulation of the breeding season. New Zealand Veterinary Journal 49(3): 88-93, 2005

Antimicrobial agents in extender and their effect on semen preservation and pregnancy rate of inseminated mares. Theriogenology 58(2/4): 667-670, 2002

Twin embryos in mares. I: From ovulation to fixation. Equine Veterinary Journal 21(3): 166-170, 1989