We studied the role of progesterone receptor (PR) in the display of female sexual behavior during postpartum estrus in rats. Adult female rats were treated with the PR antagonist, RU486 (1.25 and 5 mg), 3 h after parturition and sexual behavior was evaluated throughout the first postpartum day. Estradiol and progesterone serum levels changed during the first 24 h postpartum. The highest estradiol and progesterone levels were found at 9 and 12 h postpartum, respectively. The predominant PR isoform in the hypothalamus and the preoptic area was PR-A during postpartum day. The content of PR-A increased at 6 h postpartum in the hypothalamus and the preoptic area, and decreased in both regions at 9 h. PR-B content only increased in the preoptic area at 12 h postpartum. The highest display of lordotic and proceptive behaviors were found at 12 h postpartum. The treatment with 1.25 and 5 mg of RU486 respectively reduced lordosis by 61% and 92% at 12 h postpartum. These results suggest that PR is essential in the display of postpartum estrus in rats.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.yhbeh.2010.10.008 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Relative increase in walking activity in lactating dairy cows submitted to timed artificial insemination: Risk factors and subsequent fertility.
Anim Reprod Sci
January 2025
Agrotecnio Center, Department of Animal Sciences, University of Lleida, Lleida 25198, Spain.
The objectives of this study were: (i) to evaluate the associations between postpartum health disorders, relative increase in walking activity (RIWA) and expression of behavioral estrus intensity captured by pedometers; (ii) to assess associations between RIWA and pregnancy in cows submitted to timed artificial insemination (TAI). Lactating dairy cows (n = 881) were enrolled in the study. Cows were submitted to a 5d TAI protocol with insertion of a progesterone device.
View Article and Find Full Text PDFReproductive outcomes of lactating dairy cows submitted to first timed artificial insemination protocols with different strategies to induce final ovulation.
J Dairy Sci
January 2025
Department of Animal Science, University of São Paulo, Piracicaba, SP, Brazil, 13418-900. Electronic address:
The study evaluated strategies for induction of ovulation at the end of timed AI (TAI) protocols initiated after a novel presynchronization strategy. A total of 909 lactating dairy cows from 6 dairy herds initiated a presynchronization protocol on d -15 with an intravaginal progesterone (P4) implant and 7 d later (d -8) were treated with 1.0 mg of estradiol cypionate (EC) and 0.
View Article and Find Full Text PDFEffects of cloprostenol and oxytocin on ultrasonographic changes of uterine horns in postpartum primiparous Hu sheep.
Anim Reprod Sci
January 2025
College of Animal Science and Technology, Shihezi University, Shihezi 832003, China. Electronic address:
This study aimed to evaluate the effects of exogenous hormones on postpartum ultrasonographic changes of uterine horn in Hu sheep. 90 nulliparous Hu sheep were divided into three groups according to the number of lambs. Each group was further randomly subdivided into three groups (n = 10), a control group (sodium chloride), a PG group (cloprostol), and a PG+OT group (cloprostol + oxytocin).
View Article and Find Full Text PDFEffects of altrenogest supplementation in late lactation on reproductive performance of primiparous sows.
Theriogenology
February 2025
Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil. Electronic address:
Genetic selection for hyperprolific sows resulted in higher proportion of low birthweight piglets and greater birthweight variation within the litter, increasing preweaning mortality. There is evidence that altrenogest supplementation improves post-weaning reproductive performance through higher ovulation rates, and increased embryo survival. This study aimed to evaluate the impacts of altrenogest supplementation during the last week of lactation in primiparous sows on subsequent reproductive performance.
View Article and Find Full Text PDFEstrus response and pregnancy rate of swamp buffalo: The use of multivitamins in different estrus synchronization hormone protocols.
J Adv Vet Anim Res
September 2024
Department of Animal Production Technology, Faculty of Animal Science, Universitas Andalas, Padang, Indonesia.
Objective: This study aims to determine the effect of using multivitamins in different estrus synchronization hormone protocols on estrus response, estrus onset, estrus duration, estrus intensity, and pregnancy rate in swamp buffalo.
Materials And Methods: This study used 30 post-partum adult buffalo, with three estrus synchronization methods treated: 1. Conventional plus Prostaglandin F2 α (PGF2α-PGF2α + multivitamin)-AI; 2.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!