Dissimilarities in sows ovarian status at the insemination time could explain differences in fertility between farms when frozen-thawed semen is used

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Bolarin, AUniversity of Murcia, Spain (author)

Dissimilarities in sows ovarian status at the insemination time could explain differences in fertility between farms when frozen-thawed semen is used

Article/chapterEnglish2006

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Elsevier,2006
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LIBRIS-ID:oai:DiVA.org:liu-101808
https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-101808URI
https://doi.org/10.1016/j.theriogenology.2005.06.006DOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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Deep intrauterine insemination (DUI) offers a suitable alternative for the commercial use of frozen-thawed boar semen. The present study evaluated how the ovarian status at DUIs of frozen-thawed spermatozoa. (1 x 10(9) spz/dose, two DUls, 30-31 and 36-37 h after detection of oestrus) in 179 sows would explain differences in fertility between two farms with similar, but not equal, reproductive management (experiment 1). A further experiment investigated whether an increase in sperm number per AI-dose (1 versus 2 x 10(9) spz/dose, two DUls, 30-31 and 36-37 h after detection of oestrus, on 228 sows) could minimize this effect (experiment 2). Ovaries were checked by transrectal ultrasonography at the time of DUI and sows were classified into three categories: F-: ovarian pre-ovulatory follicles were visible during two examinations; O-: ovulation visible during one examination; and C-sows: corpora hemorragica visible during the two examinations. Overall farrowing rates differed (P less than 0.01) between farms (70.1 versus 51.2%, farms A and B, respectively). Distribution of sows among ultrasonography categories also differed (P less than 0.05) between farms (17.5, 72.2 and 10.3% were classified as F, O- and C-sows in farm A, versus 40.2, 29.3 and 30.5% in farm B). Nevertheless, farrowing rates and litter sizes within categories did not vary between farms (P greater than 0.05). In addition, a two-fold increase in the number of spermatozoa per DUI improved (P less than 0.05) fertility in F- and C-sows, but not in O-sows. In conclusion, the interval DUI-to-ovulation provides a major explanation for fertility differences between farms when frozen-thawed spermatozoa are used. (c) 2005 Elsevier Inc. All rights reserved.

Subject headings and genre

frozen-thawed spermatozoa; DUI; fertility; ovulation; transrectal ultrasonography; sow
TECHNOLOGY
TEKNIKVETENSKAP

Added entries (persons, corporate bodies, meetings, titles ...)

Roca, JUniversity of Murcia, Spain (author)
Rodriguez-Martinez, HeribertoSLU, Sweden;(Swepub:liu)herro55 (author)
Hernandez, MUniversity of Murcia, Spain (author)
Vazquez, JMUniversity of Murcia, Spain (author)
Martinez, EAUniversity of Murcia, Spain (author)
University of Murcia, SpainSLU, Sweden; (creator_code:org_t)

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In:Theriogenology: Elsevier65:3, s. 669-6800093-691X1879-3231

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By the author/editor: Bolarin, A; Roca, J; Rodriguez-Martin ...; Hernandez, M; Vazquez, JM; Martinez, EA

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