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Why Wont My Mare Get Pregnant (Anderson)
- 1. My Horse University and eXtension’s HorseQuest welcome you to this live Webcast. Why Won’t my Mare Get Pregnant? Kathy Anderson University of Nebraska-Lincoln
- 5. Seasonality of the Mare
- 15. Is She Healthy?
- 20. Is Her Reproductive Anatomy Normal?
- 24. Is She Fertile?
- 26. Influence of Mare’s Age on Reproductive Efficiency TABLE 1. 3-8 Years 9-13 Years 14-18 Years >18 Years TOTAL No. Mares 386 214 118 50 768 No. Estrus Cycles 592 328 190 95 1205 Day 15 Preg./Cycle 64.7 65.5 60.0 44.2 62.6 Day 40 Preg/Cycle 60.8 58.5 50.5 34.7 56.5 % Preg. Lost Days 15-40 6.0 10.7 15.8 21.4 9.7 % Preg. Lost Day 40-Foaling 8.4 8.3 16.0 15.2 9.8 % Mares Produced Live Foal 84.7 82.2 66.9 56.0 79.4
- 33. Twinning in Mares All twin pregnancies 60% Live single Foal 9% Carry both twins to term 31% Abort both 64.5% 2 stillborn 21% 1 live, 1 stillborn 14.5% 2 live twins
- 34. Is He Fertile?
- 44. Thank you for attending this live web presentation! For more information about My Horse University please visit us at: www.myhorseuniversity.com info@myhorseuniversity.com | www.myhorseuniversity.com | 517-353-3123
Editor's Notes
- These are the various signs most mares will show during estrus or while in heat. Mares are very consistent in what they do from cycle to cycle. Some mares will always tease up to a 4, whereas others be most they will show is a 2. A good manager becomes familiar with their mares, and knows what each one will do.
- Foal heat mares may have slightly lower conception rates, so it is a good idea to be selective and screen mares. Mares should be screened for difficult parturition, retained placenta, and condition. A uterine lavage can be used to flush out the uterus 2-5 days post parturition to stimulate uterine involution and improve conception rates. To short cycle a mare, give PGF 6-7 days following ovulation, which will shorten the interval from foaling to rebreeding about 10 days.
- During lactation, lactational anestrus may occur in some mares. A postpartum mare that does not show estrus may or may not ovulate. Her body condition score and if she foaled earlier in the year should be considered. Restrictive nursing can also be implemented by separating the mare and foal and only allowing nursing 4-6 times per day. Another treatment for lactational anestrus is regumate treatment.
- Mares at a CS of 5 or below took longer to cycle than other mares. This was generally until they were up to a CS of around 5. Furthermore they took more cycles to be bred, and if remained thin, had an increase in early embryonic loss
- CS 5+ cycled earlier in the year, took fewer cycles to settle, had an overall higher PG rate and improve PG maintenance