Age and pasture effects on vernal transition in mares

Theriogenology

Volumn 47, Issue 5, 1997, Pages 1009-1018

  Carnevale, E M ^a,b   Hermenet, M J ^a   Ginther, O J ^a  

^a UNIVERSITY OF WISCONSIN MADISON   (United States)

^b SOUTHERN ILLINOIS UNIVERSITY   (United States)

Author keywords

Age; Cyclicity; Grass; Mare; Spring

Indexed keywords

AGE; ANIMAL EXPERIMENT; ARTICLE; CONTROLLED STUDY; FEEDING; FEMALE; FOOD INTAKE; NONHUMAN; OVARY FOLLICLE DEVELOPMENT; OVULATION; SEASONAL VARIATION;

EID: 0031109737     PISSN: 0093691X     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0093-691X(97)00058-7     Document Type: Article

References (24)

1. Adashi EY, Resnick CE, D'Ercole AJ, Svoboda ME, Van Wyk JJ. Insulin-like growth factors as intraovarian regulators of granulosa cell growth and function. Endocr Rev 1985;6:400-420.
2. Allen WR. Control of oestrus and ovulation in the mare, to: Crighton DB, Haynes NB, Foxcroft GR, Lamming GE (eds), Control of Ovulation. Oxford: Butterworths, 1978;453-468.
3. Asa CS, Ginther OJ. Glucocorticoid suppression of oestrus, follicles, LH and ovulation in the mare. J Reprod Fertil 1982;32(Suppl):247-251.
4. Berger JP, Negus NC, Sanders EH, Gardner PD. Chemical triggering of reproduction in Microtus montanus. Science 1981;214:69-70.
5. Carnevale EM, Bergfelt DR, Ginther OJ. Aging effects on follicular activity and concentrations of FSH, LH, and progesterone in mares. Animal Reprod Sci 1993;31:287-299.
6. Carnevale EM, Bergfelt DR, Ginther OJ. Follicular activity and concentrations of FSH and LH associated with senescence in mares. Animal Reprod Sci 1994;35:231-246.
7. Colborn DR, Thompson DL Jr, Roth TL, Capehart JS, White KL. Responses of cortisol and prolactin to sexual excitement and stress in stallions and geldings. J Anim Sci 1991;69:2556-2562.
8. DePew CL, Thompson DL Jr, Fernandez JM, Sticker LS, Burleigh DW. Changes in concentrations of hormones, metabolites, and amino acids in plasma of adult horses relative to overnight feed deprivation followed by a pellet-hay meal fed at noon. J Anim Sci 1994;72:1530-1539.
9. Eisenhauer KM, Chun S-Y, Billig H, Hsueh AJW. Growth hormone suppression of apoptosis in preovulatory rat follicles and partial neutralization by insulin-like growth factor binding protein. Biol Reprod 1995;53:13-20.
10. Ginther OJ. Occurrence of anestrus, estrus, diestrus, and ovulation over a 12-month period in mares. Am J Vet Res 1974;35:1173-1179.
11. Ginther OJ, Reproductive Biology of the Mare. Cross Plains, WI: Equiservices, 1992.
12. Ginther OJ, Bergfelt DR, Scraba ST, Pivonka PR, Nuti LC. Effects of 6-MBOA on reproductive function in ponies, mice, rats and mink. Theriogenology 1985;24:587-595.
13. Ginther OJ, Carnevale EM, Bergfelt DR. Delay in emergence of the ovulatory wave in old mares. J Equine Vet Sci 1993;13:75-79.
14. Guthrie HD, Pursel VG, Bolt JD, Nachman RJ. Effect of gonadotropin-releasing hormone, stage of sexual maturation and 6-methoxybenzoxaoline on plasma gonadotropins, ovarian development and uterine weight in prepuberal gilts. Theriogenology 1984;22:683-692.
15. Henneke DR, Potter GD, Kreider JL. Body condition during pregnancy and lactation and reproductive efficiency of mares. Theriogenology 1984;21:897-909.
16. Johnson AL. Serum concentrations of prolactin, thyroxine and triiodothyronine relative to season and the estrous cycle in the mare. J Anim Sci 1986;62:1012-1020.
17. Kincaid LA, Thompson DL Jr, DePew CL, Rahmanian MS, Hoffman R. Prolactin administration to seasonally anestrous mares: Effects on estrus and ovulation, glucose and fat metabolism, and hair shedding. J Anim Sci 1995;73(Suppl 1):215 abstr.
18. Kubiak JR, Crawford BH, Squires EL, Wrigley RH, Ward GM. The influence of energy intake and percentage of body fat on the reproductive performance of nonpregnant mares. Theriogenology 1987;28:587-598.
19. Morris RP, Rich GA, Ralston SL, Squires EL, Pickett BW. Follicular activity in transitional mares as affected by body condition and dietary energy. Proc 10th Equine Nutr Physiol Symp 1987;93-97.
20. Nequin LG, King SS, Johnson AL, Gow GM, Ferreira-Dias GM. Prolactin may play a role in stimulating the equine ovary during the spring reproductive transition. J Equine Vet Sci 1993;13:631-635.
21. Sticker LS, Thompson DL Jr, Fernandez JM, Bunting LD, DePew CL. Dietary protein and(or) energy restriction in mares: Plasma growth hormone, IGF-I, prolactin, cortisol, and thyroid hormone responses to feeding, glucose, and epinephrine. J Anim Sci 1995;73:1424-1432.
22. U.S. Research Medical Research and Development Command. Nutritional and immunological assessment of ranger students with increased caloric intake. U.S. Army Research Institute of Environmental Medicine 1994;December:5-l to 5-30.
23. Vanderwall DK, Woods GL. Age-related subfertility in the mare. Am Assoc Equine Pract 36th Ann Conv 1990;85-89.
24. van Neikerk CH, van Heerden JS. Nutrition and ovarian activity of mares early in the breeding season. J South Afr Vet Assoc 1972;43:351-360.