A comparison of the reproductive performance in primiparous sows following two timed artificial insemination protocols

Timed artificial insemination (TAI) is an efficient reproductive technology in batch farrowing production that aids management in pig farms. However, the effect of TAI on the reproduction performance is still controversial. This study aimed to evaluate the effects of two TAI protocols on the reprodu...

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Autores principales:	J.H. Bai, Y.S. Qin, S.L. Zhang, X.L. Xu, Y.Q. Song, L.L. Xiao, T. Feng, J.H. Tian, Y. Liu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Batch farrowing Controlled ovulation Farrowing rate Gonadorelin Swine Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/b5c0105b0eb643c99cc882b1e575408b
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spelling	oai:doaj.org-article:b5c0105b0eb643c99cc882b1e575408b2021-11-28T04:29:29ZA comparison of the reproductive performance in primiparous sows following two timed artificial insemination protocols1751-731110.1016/j.animal.2021.100410https://doaj.org/article/b5c0105b0eb643c99cc882b1e575408b2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1751731121002536https://doaj.org/toc/1751-7311Timed artificial insemination (TAI) is an efficient reproductive technology in batch farrowing production that aids management in pig farms. However, the effect of TAI on the reproduction performance is still controversial. This study aimed to evaluate the effects of two TAI protocols on the reproductive performance of primiparous sows. A total of 332 weaned sows were randomly allocated into three treatments. Sows assigned to Control (n = 110) were untreated and inseminated on each day in oestrus after weaning. Sows assigned to eG-TAI (n = 112) received equine chorionic gonadotropin (eCG) 24 h after weaning and gonadotropin-releasing hormone (Gonadorelin: GnRH) at oestrus, and were inseminated at 8 and 32 h later if oestrus at 0800, or 16 and 40 h later if oestrus at 1600. Sows assigned to 2e-TAI (n = 110) received eCG and GnRH 24 h and 96 h after weaning, respectively, and were inseminated 16 and 40 h after GnRH administration. Sows showing oestrus at GnRH administration or 64 h after were inseminated immediately, for a total of three inseminations. Ultrasonographic evaluations were performed to determine the follicular diameter and time of ovulation. Most sows in the 2e-TAI and eG-TAI groups ovulated 0–48 h after the GnRH injection. Our results indicated that oestrus rate within seven days after weaning in the experimental groups was higher, and weaning-to-oestrus interval was shorter than in the control group (99.3 h vs 113.5 h, P < 0.05). The breeding and farrowing rates in the experimental groups were significantly higher than in the control group (P < 0.05), while the numbers of total born, live-born and stillborn were not different among the three groups (Control: 12.7, 11.6 and 1.1; 2e-TAI: 12.4, 11.3 and 1.0; eG-TAI: 12.0, 11.4 and 0.4, respectively). These results indicated that TAI could ensure a high farrowing rate in primiparous sows under batch farrowing management.J.H. BaiY.S. QinS.L. ZhangX.L. XuY.Q. SongL.L. XiaoT. FengJ.H. TianY. LiuElsevierarticleBatch farrowingControlled ovulationFarrowing rateGonadorelinSwineAnimal cultureSF1-1100ENAnimal, Vol 15, Iss 12, Pp 100410- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Batch farrowing Controlled ovulation Farrowing rate Gonadorelin Swine Animal culture SF1-1100
spellingShingle	Batch farrowing Controlled ovulation Farrowing rate Gonadorelin Swine Animal culture SF1-1100 J.H. Bai Y.S. Qin S.L. Zhang X.L. Xu Y.Q. Song L.L. Xiao T. Feng J.H. Tian Y. Liu A comparison of the reproductive performance in primiparous sows following two timed artificial insemination protocols
description	Timed artificial insemination (TAI) is an efficient reproductive technology in batch farrowing production that aids management in pig farms. However, the effect of TAI on the reproduction performance is still controversial. This study aimed to evaluate the effects of two TAI protocols on the reproductive performance of primiparous sows. A total of 332 weaned sows were randomly allocated into three treatments. Sows assigned to Control (n = 110) were untreated and inseminated on each day in oestrus after weaning. Sows assigned to eG-TAI (n = 112) received equine chorionic gonadotropin (eCG) 24 h after weaning and gonadotropin-releasing hormone (Gonadorelin: GnRH) at oestrus, and were inseminated at 8 and 32 h later if oestrus at 0800, or 16 and 40 h later if oestrus at 1600. Sows assigned to 2e-TAI (n = 110) received eCG and GnRH 24 h and 96 h after weaning, respectively, and were inseminated 16 and 40 h after GnRH administration. Sows showing oestrus at GnRH administration or 64 h after were inseminated immediately, for a total of three inseminations. Ultrasonographic evaluations were performed to determine the follicular diameter and time of ovulation. Most sows in the 2e-TAI and eG-TAI groups ovulated 0–48 h after the GnRH injection. Our results indicated that oestrus rate within seven days after weaning in the experimental groups was higher, and weaning-to-oestrus interval was shorter than in the control group (99.3 h vs 113.5 h, P < 0.05). The breeding and farrowing rates in the experimental groups were significantly higher than in the control group (P < 0.05), while the numbers of total born, live-born and stillborn were not different among the three groups (Control: 12.7, 11.6 and 1.1; 2e-TAI: 12.4, 11.3 and 1.0; eG-TAI: 12.0, 11.4 and 0.4, respectively). These results indicated that TAI could ensure a high farrowing rate in primiparous sows under batch farrowing management.
format	article
author	J.H. Bai Y.S. Qin S.L. Zhang X.L. Xu Y.Q. Song L.L. Xiao T. Feng J.H. Tian Y. Liu
author_facet	J.H. Bai Y.S. Qin S.L. Zhang X.L. Xu Y.Q. Song L.L. Xiao T. Feng J.H. Tian Y. Liu
author_sort	J.H. Bai
title	A comparison of the reproductive performance in primiparous sows following two timed artificial insemination protocols
title_short	A comparison of the reproductive performance in primiparous sows following two timed artificial insemination protocols
title_full	A comparison of the reproductive performance in primiparous sows following two timed artificial insemination protocols
title_fullStr	A comparison of the reproductive performance in primiparous sows following two timed artificial insemination protocols
title_full_unstemmed	A comparison of the reproductive performance in primiparous sows following two timed artificial insemination protocols
title_sort	comparison of the reproductive performance in primiparous sows following two timed artificial insemination protocols
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/b5c0105b0eb643c99cc882b1e575408b
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A comparison of the reproductive performance in primiparous sows following two timed artificial insemination protocols

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