Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/45099
Title: The effect of small doses of naloxone on the initiation and duration of the first estrus after weaning in sows
Author: Fuentes, V.O.
Alvarez, J.J.
Hernandez, A.
Fuentes, P.I.
Sanchez, R.
Issue Date: 2003
Abstract: The present research was conducted with the objective of studying the pharmacological effect of small doses of naloxone on the initiation and duration of the first estrus after weaning in the sow. For this purpose, 32 multiparous sows were used. Sows were divided at random into two groups. Group 1 (n = 16) was treated by i.m. injection with 2 mg naloxone at 12 h intervals from 3 days before until 3 days after weaning. Group 2 (n = 16) served as the control group and received saline solution at the same times as treatments for group 1. First estrus after weaning occurred at 85 � 5.2 and 108.3 � 5 h (P < 0.05) in naloxone- and saline-treated sows. Duration of estrus was 89.6 � 3.9 and 49.6 � 3.9 h (P < 0.05) in naloxone-treated and control animals, respectively. It was concluded that naloxone treatment advanced the time of appearance and duration of the first estrus after weaning in sows giving further support that endogenous opioids (EOP) are modulators of sexual behavior in female pigs. � 2003 Published by Elsevier Science B.V.
URI: http://www.scopus.com/inward/record.url?eid=2-s2.0-0142039139&partnerID=40&md5=5f3748799ed8b5a903075ace9e38c95d
http://ovidsp.ovid.com/ovidweb.cgi?T=JS&CSC=Y&NEWS=N&PAGE=fulltext&D=med4&AN=12853185
http://hdl.handle.net/20.500.12104/45099
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