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Pregnancy Diagnosis in Horses
by Robert N. Oglesby DVM
Introduction
Introduction
»
Experience Counts
»
Ultrasound
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Pregnant Mares Do Not Return to Heat (Usually)
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Rectal Palpation
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Hormonal Changes
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Visual Assessment
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More Info
The determination of pregnancy in a broodmare is an important aspect of any breeding program. With natural service these are fairly easy to determine, on most mares. But with the increase of artificial insemination (AI) many breeding mares today are on farms where there is no stallion on site to constantly tease mares. Even when there is a stallion and good teasing practices are used, a percentage (appx. 10%) of normal mares may be difficult to tell if they have come back into heat following breeding. Because a mare only ovulates once every 21 days the accurate timing of insemination and the early detection of non-pregnant mares helps prevent a late season foal or missed season all together. This article discusses the various techniques available, including hormonal changes for checking miniature horses, to the horseman and veterinarian for a pregnancy diagnosis in equines and their relative advantages and disadvantages. Links to related articles and scientific reports are also present.
Note: the following article discusses different ways to determine if a mare is pregnant. The techniques are presented roughly in order of how early they can detect pregnancy.
~Word Count: 1739 words (The average magazine page contains about 600 words);
~Last Updated: May 28, 2008;
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Discussions on Pregnancy Diagnosis
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Subtopics |
Posts |
Updated |
 | Mammary gland development in early pregnancy | 1 | 2 | Aug 3, 08 |
| Mare 4 months in foal showing in season (?) | 1 | 9 | Dec 3, 07 |
| Clarification on the blood ES test | 1 | 4 | Oct 18, 06 |
| Mare is too far along | 1 | 3 | Oct 6, 06 |
| Pregnant mare acts as though in heat | 1 | 6 | Aug 30, 06 |
| Estrone Sulfate levels | 1 | 2 | Jan 11, 06 |
| Pregnant 2 year old Mustang | 1 | 7 | Jul 12, 05 |
| Ultrasound at day 18 appears to be in foal but has adema | 1 | 3 | May 2, 05 |
| Pregnacy check at 110 days post ov. | 1 | 12 | Aug 28, 04 |
| Pregnant? | 1 | 7 | Jun 22, 04 |
| Pregnant - yes/no/maybe? | 1 | 2 | Feb 23, 04 |
| Pregnant mare discharging a bit of blood | 1 | 4 | Apr 24, 03 |
| Question about palpation at 45 days | 1 | 8 | Apr 17, 03 |
| Was drug safe if she's pregnant | 1 | 5 | Apr 4, 03 |
| SURPRISE!!!!! | 1 | 3 | Feb 20, 03 |
| Can a mare come show signs of estrus while pregnant? | 1 | 6 | Jan 23, 03 |
| Is she pregnant? | 1 | 17 | Jul 25, 02 |
| Time frame for Ultrasound | 1 | 9 | Jul 5, 05 |
| Pregnancy | 1 | 10 | Aug 9, 01 |
| Pregnant mare with discharge | 1 | 3 | Jun 12, 03 |
| Mare ultrasounded at 14 days but.... | 1 | 5 | Jul 18, 01 |
| Is a blood test 100% accurate? | 1 | 5 | Feb 19, 04 |
| Pregnancy testing. | 1 | 3 | Feb 4, 01 |
| False Pregnancy | 1 | 8 | Feb 19, 04 |
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