geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Relationship between metabolic hormones and ovulation of dominant follicle during the first follicular wave post-partum in high-producing dairy cows


, : Relationship between metabolic hormones and ovulation of dominant follicle during the first follicular wave post-partum in high-producing dairy cows. Reproduction 133(1): 155-163

Recent studies suggest that IGF-I is a crucial regulatory factor in follicular growth during early post-partum period. The aim of the present study was to determine in detail the changing profiles of metabolic and reproductive hormones in relation to ovulation of the dominant follicle (DF) of the first follicular wave post-partum in high-producing dairy cows. Plasma concentrations of related hormones in 22 multiparous Holstein cows were measured from 4 weeks pre-partum to 3 weeks post-partum, and the development of DF was observed with colour Doppler ultrasound. Thirteen cows showed ovulation by 15.2 days post-partum. Anovulatory cows showed higher GH and lower IGF-I levels than those in ovulatory cows during the peri-partum period. Each DF developed similarly, and a clear blood flow in the follicle wall was observed despite ovulation or anovulation. In addition, detailed endocrine profiles were analyzed in 9 out of the 22 cows. Five cows showed an increase in plasma oestradiol-17(Sb(B (E2) with follicular growth followed by E2 peak, LH surge and ovulation. In these cows, plasma IGF-I concentrations remained high until 10 days post-partum followed by a gradual decrease. Subsequently, the insulin level increased together with the E2 peak towards ovulation. These profiles were not observed in anovulatory cows. In conclusion, our data strongly support the concept that IGF-I and insulin represent 'metabolic signals' of the resumption of ovarian function post-partum in high-producing dairy cows. Moreover, we provide the first visual evidence that both ovulatory and anovulatory DFs of the first follicular wave post-partum are similarly supplied with active blood flow.

US$19.90

PMID: 17244742

DOI: 10.1530/REP-06-0046


Other references

Hausdorff, J.M.; Forman, D.E.; Pilgrim, D.M.; Goldberger, A.L.; Rigney, D.R.; Wei, J.Y., 1993: Preserved walking-induced cardioacceleration in the elderly despite reduced heart rate response to standing. American Journal of Cardiology 72(14): 1077-1079

Metz, J.; Waechter, A.; Schwappach, B., 2003: Interaction of the yeast CLC channel with an ATPase protein. Journal of General Physiology 122(1): 6a-7a, July

Wassermann, D., 2002: Criteria for burn severity. Epidemiology. prevention, organization of management. Total body surface area burned and deep of the skin injury are the main determinants of the burn severity. Other factors like age of the patient, pathological conditions, pulmonary injury by smoke inhalation, wound localizations play also a major...

Odeblad, E., 1953: Artefacts in autoradiography. A number may be controlled and prevented. These are enumerated and discussed in detail in relation to the various methods of autoradiography employed.

Edson Fanny Carter, 1927: Ordovician correlations in Oklahoma. Bulletin of the American Association of Petroleum Geologists 11(9): 967-975

Pfister J., 1984: Study of the types of peck and murrill which belong or belonged to the genus melanoleuca. The 88 spp. described by Murrill under the generic name of Melanoleuca, and 43 spp. described by Peck and transferred into the same genus by Murrill and Singer are briefly examined. Among them 6 spp. belonging really to the genus Melanoleuca, i.e....

Bullard, J.R., 1995: Extendable and retractable laryngoscope. Official Gazette of the United States Patent & Trademark Office Patents 1170(3): 1623, Jan 17

Vidal, C.; Padro, S.; Falgueras, T.; Mallolas, J.; Pumarola, T.; Leal, M.; Gatell, J.M.; Soriano, E.; Jimenez D.A.ta, M.T., 1995: Monotherapy versus combination for anti-retroviral-naive advanced HIV patients. Journal of Acquired Immune Deficiency Syndromes & Human Retrovirology 10(SUPPL 3): S20

Tullgren, Albert., 1910: Frostfjariln (Cheimatobia brumata L.). Entomologisk Tidskrift Stockholm, 31 250-257

Kozarsky, K.F.; McKinley, D.R.; Austin, L.L.; Raper, S.E.; Stratford-Perricaudet, L.D.; Wilson, J.M., 1994: In vivo correction of low density lipoprotein receptor deficiency in the Watanabe heritable hyperlipidemic rabbit with recombinant adenoviruses. A rabbit animal model of the human disease familial hypercholesterolemia (FH), which is the result of low density lipoprotein (LDL) receptor deficiency, was used to develop an in vivo approach to gene therapy based on recombinant adenoviruses. Rec...