Milk and serum progesterone levels in mares after ovulation.
Abstract: Twenty-four Finnhorse mares were examined by rectal palpation and ultrasonography every 6 h during late oestrus to determine the time of ovulation. Milk and serum samples were collected every 6 h after the detected ovulation for progesterone analysis. The progesterone rises took place within 0-54 h and 0-60 h after ovulation, in milk and serum, respectively. Statistically significant differences (p less than 0.05) in progesterone levels were observed for the first time 12-18 h and 18-24 h after ovulation, in serum and milk, respectively, as compared to progesterone levels 0-6 h after ovulation. Tidpunkten för Ovulationen hos 24 Finska kallblodston fastställdes genom rektalpalpation och ultraljudundersökning utförda var sjätte timme under sen estrus. Under tidig diestrus insamlades mjölk och serum prover för progesteron analyser. Progesteronnivåerna steg inom 0–54 och 0–60 timmar i mjölk respektive serum. Statistiskt signifikanta skillnader (p < 0.05) i progesteronnivåerna konstaterades 12–18 timmar och 18–24 timmar efter Ovulationen i serum respektive mjölk jämförda med progesteronnivåerna 0–6 timmar efter Ovulationen.
Publication Date: 1990-01-01 PubMed ID: 2099621PubMed Central: PMC8133153DOI: 10.1186/BF03547526Google Scholar: Lookup
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- Journal Article
Summary
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The research investigates the progesterone levels in the milk and serum of ovulating mares, to understand the uptakes of progesterone post-ovulation. The research indicates that significant surges of progesterone occur within specific periods after ovulation, highlighting some variations between progesterone levels in milk and serum.
Objective of the Study
- The primary aim of this study was to accurately determine the timing of progesterone rises in the milk and serum samples of 24 Finnhorse mares after ovulation.
Methodology
- The researchers used both rectal palpation and ultrasonography to examine the mares every six hours during their late oestrus period to pinpoint the time of ovulation.
- Subsequent to the identified ovulation, milk and serum samples of these animals were gathered for progesterone analysis. The collection process occurred every 6 hours after ovulation.
Findings
- The study identified that progesterone levels in both milk and serum samples increased within 0-54 hours and 0-60 hours post ovulation, respectively.
- A statistically significant surge in progesterone levels (p < 0.05) was first noted within 12-18 hours and 18-24 hours, in serum and milk respectively, in contrast to the progesterone levels measured in the 0-6 hour post-ovulation window.
Implications
- This research is significant as it provides clear evidence on the changes of progesterone levels in mares after ovulation. This can simplify the timing for future progesterone analysis and tests in physiological and veterinary contexts.
- The findings also emphasize the differences in the progesterone uptake in serum and milk, which may guide further research on the metabolic and endocrine systems of mares.
Cite This Article
APA
Koskinen E, Lindeberg H, Kuntsi H, Katila T.
(1990).
Milk and serum progesterone levels in mares after ovulation.
Acta Vet Scand, 31(4), 441-444.
https://doi.org/10.1186/BF03547526 Publication
Researcher Affiliations
- Agricultural Research Centre, Equine Research Station, Ypäjä, Finland.
MeSH Terms
- Animals
- Female
- Horses / physiology
- Milk / chemistry
- Ovulation / physiology
- Ovulation Detection / veterinary
- Progesterone / analysis
- Progesterone / blood
References
This article includes 14 references
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Citations
This article has been cited 4 times.- Relave F, Lefebvre RC, Beaudoin S, Price C. Accuracy of a rapid enzyme-linked immunosorbent assay to measure progesterone in mares.. Can Vet J 2007 Aug;48(8):823-6.
- Hedberg Y, Dalin AM, Santesson M, Kindahl H. A preliminary study on the induction of dioestrous ovulation in the mare--a possible method for inducing prolonged luteal phase.. Acta Vet Scand 2006 Jul 26;48(1):12.
- Koskinen E, Huhtinen M, Katila T. Serum progesterone levels in mares in winter and during transitional periods.. Acta Vet Scand 1996;37(4):409-14.
- Koskinen E. Post-partum ovarian activity in Finnhorse mares with special reference to seasonal effects.. Acta Vet Scand 1991;32(3):313-8.
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