VetSRev
Database of veterinary systematic reviews
Database of veterinary systematic reviews
Tierarztliche Praxis. Ausgabe G, Grosstiere/Nutztiere (2011) 39: 135–142
Link: https://www.thieme-connect.com/products/ejournals/abstract/10.1055/s-0038-1624628
OBJECTIVE: In order to improve fertility in female domestic animals, especially in bitches, several authors recommend the feeding of the amino acid L-Tyrosine during the follicular phase of the oestrous cycle. The aim of this article was a systematic and statistical analysis of current literature in terms of evidence-based medicine. MATERIALS AND METHODS: Literature research, statistical analysis and classification in levels of evidence. RESULTS: Fifteen German and two English studies on the effect of L-Tyrosine on the fertility in domestic animals were found. The statistical analysis and evaluation of evidence showed that most studies feature methodical deficits and often findings were inconsistent with one another. CONCLUSION AND CLINICAL RELEVANCE: Heterogeneous results indicate a considerable need for further research on the effectiveness and dose of L-Tyrosine to legitimate its appliance in practice.
Spankowsky, S., Arlt, S., Arndt, G., & Heuwieser, W. (2011). [Validity of the use of L-Tyrosine to enhance fertility of female domestic animals. A study on the evidence from the literature]. Tierarztliche Praxis. Ausgabe G, Grosstiere/Nutztiere, 39(3), 135–142. https://www.thieme-connect.com/products/ejournals/abstract/10.1055/s-0038-1624628 Animals, Female, Dogs, Swine, Cattle, Pigs, Domestic/physiology, Evidence-Based Practice, Dose-Response Relationship, Drug, Fertility/drug effects, Follicular Phase/drug effects, Tyrosine/administration & dosage/pharmacology