Presentation Title

Comparing the effect of in-vitro versus in-vivo fertilization on horse (Equus ferus caballus) gestation lengths

Faculty Mentor

Holly M. Greene, Cord M. Brundage

Start Date

23-11-2019 8:00 AM

End Date

23-11-2019 8:45 AM

Location

57

Session

poster 1

Type of Presentation

Poster

Subject Area

biological_agricultural_sciences

Abstract

Assisted reproductive technologies are used in the equine industry to maintain bloodlines and to preserve desirable heritable traits. Until recently, in-vitro fertilization was relatively unsuccessful, leaving only in-vivo methods of fertilization like artificial insemination (AI) possible. The development of egg intracytoplasmic sperm injection (ICSI) has provided an option for in-vitro fertilization that has significantly increased the success rate of assisted reproduction. The effect of ICSI on gestation length is poorly understood. Gestation length for the 2019 foaling season was tracked in mares impregnated via AI and ICSI methods at the W.K. Kellogg Arabian Center breeding program at California Polytechnic University, Pomona. This data was compared with historical data on gestation length at that facility. Preliminary results suggest a greater than average gestation length in mares fertilized by both AI and ICSI methods. In 2019, the average gestation length discrepancy (beyond 340 days) for mares impregnated via AI was +10 days; while the average gestation length discrepancy for mares impregnated via ICSI was +17.8 days. The results of this study will help with the care and management of reproductively-assisted mares, and will provide more information on the implications of ICSI as an alternative to in-vivo AI in horses.

This document is currently not available here.

Share

COinS
 
Nov 23rd, 8:00 AM Nov 23rd, 8:45 AM

Comparing the effect of in-vitro versus in-vivo fertilization on horse (Equus ferus caballus) gestation lengths

57

Assisted reproductive technologies are used in the equine industry to maintain bloodlines and to preserve desirable heritable traits. Until recently, in-vitro fertilization was relatively unsuccessful, leaving only in-vivo methods of fertilization like artificial insemination (AI) possible. The development of egg intracytoplasmic sperm injection (ICSI) has provided an option for in-vitro fertilization that has significantly increased the success rate of assisted reproduction. The effect of ICSI on gestation length is poorly understood. Gestation length for the 2019 foaling season was tracked in mares impregnated via AI and ICSI methods at the W.K. Kellogg Arabian Center breeding program at California Polytechnic University, Pomona. This data was compared with historical data on gestation length at that facility. Preliminary results suggest a greater than average gestation length in mares fertilized by both AI and ICSI methods. In 2019, the average gestation length discrepancy (beyond 340 days) for mares impregnated via AI was +10 days; while the average gestation length discrepancy for mares impregnated via ICSI was +17.8 days. The results of this study will help with the care and management of reproductively-assisted mares, and will provide more information on the implications of ICSI as an alternative to in-vivo AI in horses.