+ 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

Effects of reducing the remating interval after parturition on the fertility and plasma concentrations of luteinizing hormone, prolactin, oestradiol-17 beta and progesterone in lactating domestic rabbits

, : Effects of reducing the remating interval after parturition on the fertility and plasma concentrations of luteinizing hormone, prolactin, oestradiol-17 beta and progesterone in lactating domestic rabbits. Journal of Reproduction and Fertility 92(2): 281-289

Primiparous crossbred does were remated on Day 1 (n = 15) or 14 (n = 25) post partum and killed on Day 10 post coitum to assess their fertility. Blood samples were taken during the pre- (0-12 h post coitum) and post- (1-10 days post coitum) ovulatory periods and plasma was assayed for luteinizing hormone (LH), prolactin, oestradiol-17.beta. and progesterone. Ovulation response was significantly greater (P < 0.01) and ovulation rate significantly lower (P < 0.001) in does mated on Day 1 than in those mated on Day 14 post partum. Does failing to ovulate on Day 14 post partum exhibited no preovulatory LH surge and had significantly lower (P < 0.05) premating concentrations of oestradiol-17.beta. and prolactin than those ovulating at this time. No significant differences in hormone concentrations were observed during the preovulatory period between does ovulating on Days 1 and 14 post partum, with the exception of oestradiol-17.beta. Concentrations of this hormone were significantly lower (P < 0.01) in does mated on Day 1, at 1 h post coitum. We conclude that (i) fertility was affected by the remating interval after parturition, (ii) ovulation failure was associated with an absence of the preovulatory LH surge and a reduction in premating concentrations of oestradil-17.beta. and prolactin and (iii) the lowr ovulation rate in early lactation was apparently caused by a reduction in ovarian competence to respond to the gonadotrophic stimulus.


PMID: 1886088

Other references

Mustafa, A.F.; McKinnon, J.J.; Ingledew, M.W.; Christensen, D.A., 2000: The nutritive value for ruminants of thin stillage and distillers' grains derived from wheat, rye, triticale and barley. A study was conducted to determine nutrient degradabilities of thin stillages and distillers' grains derived from wheat-, rye-, triticale- and barley-based ethanol production. In vitro protein degradabilities of wheat, rye, triticale and barl...

Mishna, F., 2004: Learning disabilities and bullying: double jeopardy. Independently, learning disabilities (LD) and involvement in bullying each pose a risk for social, emotional, and behavioral problems. Based on the research to date and on the characteristics common to children with LD and children who are bullied...

Chumakov, F.I.; Deriugina, O.V., 1996: A case of tuberculous meningitis erroneously interpreted as otogenous. Vestnik Otorinolaringologii: 52-53

Hoffmann, J.; King, C.; Wooltorton, S.; Lawrence, G., 2002: George's gadgets: a multidisciplinary approach to technology for facilitating communication in an individual with ALS. Perspectives ) 23(3): 17-21

Ash, S.R.; Mankus, R.A.; Sutton, J.M.; Spray, M., 2007: The Ash Split CathTM as long-term IJ access: Hydraulic performance and longevity. A prospective observational study was performed to determine the duration of use of the Ash Split Cath placed as primary or bridge access in ESRD patients; 164 ESRD patients received a Split Cath in the IJ location, with transcutaneous placement g...

Sorahan, T.; Kheifets, L., 2007: Mortality from Alzheimer's, motor neuron and Parkinson's disease in relation to magnetic field exposure: findings from the study of UK electricity generation and transmission workers, 1973-2004. Background: There are a number of reports linking magnetic field exposure to increased risks of Alzheimer's disease and motor neuron disease.Methods: The mortality experienced by a cohort of 83 997 employees of the former Central Electricity...

Prentice, A., 2007: Are defects in energy expenditure involved in the causation of obesity?. This paper describes the components of energy expenditure and the levels of metabolic rate, diet-induced thermogenesis, physical activity and adaptive thermogenesis in obese individuals. The potential of pharmaco-manipulation of metabolic rate in...

Hinton, D.M.; Nossal, N.G., 1986: Cloning of the bacteriophage T4 uvsX gene and purification and characterization of the T4 uvsX recombination protein. The bacteriophage T4 uvsX gene is a nonessential gene required for normal levels of DNA repair, recombination, and replication. We demonstrate that plasmids containing the T4 DNA approximately 300-2900 base pairs upstream of T4 gene 41 express a b...

Chowdhuri, S.; Badr, M.Safwan., 2016: Control of Ventilation in Health and Disease. Control of ventilation occurs at different levels of the respiratory system through a negative feedback system that allows precise regulation of levels of arterial carbon dioxide and oxygen. Mechanisms for ventilatory instability leading to sleep-...

Deber C.M.; Pfeiffer D.R., 1976: Ionophore a 23187 solution conformations of the calcium complex and free acid deduced from proton and carbon 13 nmr studies. Biochemistry 15(1): 132-141