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Effect of altrenogest treatment before weaning on reproductive performance and production efficiency in primiparous and multiparous sows

Authors :
Kexiong Liu
Xiaoling Xu
Yuqing Song
Linli Xiao
Junhui Wen
Haiquan Ding
Shuxin Zhao
Dongliang Qiao
Bo Zhang
Aihua Niu
Jiahua Bai
Yan Liu
Source :
Porcine Health Management, Vol 10, Iss 1, Pp 1-9 (2024)
Publication Year :
2024
Publisher :
BMC, 2024.

Abstract

Abstract Background Most sows will experience negative energy balance during lactation resulting in impaired follicular development. This study aimed to treat 28-day lactating sows with altrenogest (ALT) to suppress follicle enlargement during lactation, and to assess the estrus and reproductive performance post-weaning. Methods In this study, we conducted two trials. In trial 1, we monitored the follicular development of lactating sows including 10 primiparous sows and 10 multiparous sows during the whole lactation to confirm the ALT administration time. In trial 2, a total of 42 primiparous and 111 multiparous sows were allocated to three treatments: Ctrl (control group, n = 51): no treatment; TAI (timed artificial insemination group, n = 51): sows were injected with equine chorionic gonadotropin (eCG) after weaning 24 h and gonadotropin-releasing hormone (GnRH) when they expressed estrus; and AT-TAI (ALT treatment-timed artificial insemination group, n = 51): base on the process of TAI group, the sows were fed with 20 mg ALT per day before weaning 10 days. All sows were artificially inseminated twice at 12 h and 36 h after estrus. The follicle size changes and serum hormone levels were explored in this process. Results Although the follicle size of multiparous sows was larger than primiparous sows during the whole lactation (P 0.05). Additionally, ALT treatment increases estrus concentration and the preovulatory follicle size (P 0.05). Conclusions There were significant differences in the size of follicles in the lactation between primiparous and multiparous sows. ALT treatment during the last ten days of lactation concentrated estrus expression leading to higher work efficiency of breeder in batch production, however, with no improvement in reproductive performance.

Details

Language :
English
ISSN :
20555660
Volume :
10
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Porcine Health Management
Publication Type :
Academic Journal
Accession number :
edsdoj.8997b9fc0994442b9271af39d30e06c
Document Type :
article
Full Text :
https://doi.org/10.1186/s40813-024-00377-7