The effect of dietary protein on reproduction in the mare. VI. Serum progestagen concentrations during pregnancy
Journal of the South African Veterinary Association
| Field | Value | |
| Title | The effect of dietary protein on reproduction in the mare. VI. Serum progestagen concentrations during pregnancy | |
| Creator | Van Niekerk, F.E. Van Niekerk, C.H. | |
| Description | Sixty-four Thoroughbred and Anglo-Arab mares aged 6-12 years were used, of which 40 were non-lactating and 24 lactating. Foals from these 24 mares were weaned at the age of 6 months. Non-lactating and lactating mares were divided into 4 dietary groups each. The total daily protein intake and the protein quality (essential amino-acid content) differed in the 4 groups of non-lactating and 4 groups of lactating mares. The mares were covered and the effect of the quantity and quality of dietary protein on serum progestagen concentrations during pregnancy was studied. A sharp decline in serum progestagen concentrations was recorded in all dietary groups from Days 18 to 40 of pregnancy, with some individual mares reaching values of less than 4 ng/mℓ. Serum progestagen concentrations recorded in some of the non-lactating mares on the low-quality protein diet increased to higher values (p0.05) than those of mares in the other 3 dietary groups at 35-140 days of pregnancy. A similar trend was observed for the lactating mares on a low-quality protein diet at 30-84 days of pregnancy. No such trends were observed in any of the other dietary groups. High-quality protein supplementation increased serum progestagen concentrations during the 1st 30 days of pregnancy. Lactation depressed serum progestagen concentrations until after the foals were weaned. | |
| Publisher | AOSIS | |
| Date | 1998-07-13 | |
| Identifier | 10.4102/jsava.v69i4.843 | |
| Source | Journal of the South African Veterinary Association; Vol 69, No 4 (1998); 143-149 2224-9435 1019-9128 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://jsava.co.za/index.php/jsava/article/view/843/817
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