Synchronization of estrus and ovulation in sows not conceiving in a scheduled fixed-time insemination program

Kauffold, Johannes; Beckjunker, Jochen; Kanora, Alain; Zaremba, W

doi:10.1016/j.anireprosci.2006.01.004

Cited by 19 publications

(17 citation statements)

References 20 publications

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“…The experiments involved a total of 14 females of German Large White ♀ × German Landrace ♂ breed and were carried out between autumn 2001 and spring 2002. Gilts were synchronized for oestrus and ovulation using Altrenogest (Regumate®; Serumwerk Bernburg, Bernburg, Germany), equine chorionic gonadotropin (Pregmagon®; Impfstoffwerk Dessau‐Tornau GmbH, Roßlau, Germany) and a GnRH‐analogue (Depherelin®; Veyx Pharma GmbH, Schwarzenborn, Germany) as described previously, and artificially inseminated (AI) twice (Wähner and Hühn 1996; Kauffold et al. 2007).…”

Section: Methodsmentioning

confidence: 99%

Effects of Feeding Level During Lactation on FSH and LH Secretion Patterns, and Follicular Development in Primiparous Sows

Kauffold¹,

Gottschalk

Schneider

et al. 2008

Reprod Domestic Animals

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In the primiparous lactating sow undernutrition affects LH, but the effect on FSH is less clear. This study was conducted to investigate the effect of ad libitum (AL; n = 5) and restricted (RE; 70% of the AL feed; n = 5) feeding on the secretion patterns of FSH and LH, and on follicular development in primiparous lactating sows. Body side fat thickness (BSFT) was measured prior to farrowing and at weaning on day 21 postpartum (pp). Sows had an intravenous catheter fitted on day 6 or 7 pp. Blood samples were taken on days 12, 15 and 18 pp, every 15 min starting at 0700 h for 11 h, and plasma analysed for FSH and LH by radioimmunoassay (RIA). Daily transcutaneous ultrasonography of the ovaries was performed between days 10 and 20 pp to monitor follicular growth. Reduction in BSFT was higher in RE than in AL sows (p < 0.05). Mean and basal LH were significantly higher in AL than in RE sows on days 12 and 15 pp. (p < 0.05), and LH pulse frequency tended to be higher (p < 0.1). Mean FSH was higher in AL than in RE sows on days 15 and 18 (p < 0.05), and had a tendency to be higher on day 12 (p = 0.1). Follicle size increased in AL sows between days 10 and 20 of lactation (p < 0.05; r = 0.71), but remained unaffected in RE sows. In conclusion, the study demonstrates that feed restriction of primiparous sows during lactation affects not only LH, but also FSH, as well as lactational follicular growth. An association between those events is suggested.

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Section: Methodsmentioning

confidence: 99%

Effects of Feeding Level During Lactation on FSH and LH Secretion Patterns, and Follicular Development in Primiparous Sows

Kauffold¹,

Gottschalk

Schneider

et al. 2008

Reprod Domestic Animals

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“…All animals were scanned to check for ovulation following an approved procedure as described recently [13,14]. Scanning was done transcutaneously using the ultrasound unit HS 2000 (Honda Electronics, Tokyo, Japan), a multi frequency linear transducer for rectal use (model HLV-475M; 5.0/7.5/10.0 MHz/ 50 mm) at a frequency of 5 MHz.…”

Section: Ultrasonographical Control Of Ovulationmentioning

confidence: 99%

“…All gilts were hormonally synchronized for estrus and ovulation as described recently [14,15]. Briefly, gilts were given 20 mg Altrenogest (5 ml Regumate ® ; Janssen Animal Health, Neuss, Germany) orally for 15 days, following by the intramuscular (im) …”

Section: Farms Animals and Reproductive Managementmentioning

confidence: 99%

“…During scanning, pre-ovulatory follicles (FOL) and corpora haemorrhagica (CH) were recorded. Determination of the ovulation time occurred in close accordance to a recently published score system, as follows [14]: FOL and CH present at first or at second AI=animals were just ovulating, respectively; FOL present at first and CH at second AI=ovulation had occurred between first and second AI. All animals included in this study had their ovulation time unambiguously determined.…”

mentioning

confidence: 99%

“…Animals were either pure Large White or a German Land Race x Large White breed. They were all kept in crates with partially slatted floors, fed a commercially available diet and had ad libitum access to water.All gilts were hormonally synchronized for estrus and ovulation as described recently [14,15]. Briefly, gilts were given 20 mg Altrenogest (5 ml Regumate ® ; Janssen Animal Health, Neuss, Germany) orally for 15 days, following by the intramuscular (im) …”

mentioning

confidence: 99%

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Use of B-mode Ultrasound and Grey-Scale Analysis to Study Uterine Echogenicity in the Pig

Kauffold

Bussche²,

Failing

et al. 2010

Journal of Reproduction and Development

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Abstract. This study was conducted to determine uterine echogenicity by grey-scale analysis (GSA) and transcutaneous ultrasonography in pregnant sows (P-sows; n=16) and gilts (P-gilts; n=13) vs. cyclic gilts (C-gilts; n=9) between days 8 and 16 post ovulation (po) with the aims of testing for feasibility of uterine GSA and of gathering reference data. Estruses and ovulations were hormonally synchronized and the animals artificially inseminated. Ovulation was monitored by ultrasound. The equipment used was a HS 2000 ultrasound unit and a 5 MHz linear probe. Unit settings were standardized for all GSA scanning sessions and the animals crated during scanning. For GSA, cross-sections of the uterine horns were imaged, entirely defined as regions of interest, and pixel analyses done. A total of 342 scanning sessions were performed, 341 GSA accomplished, and 1-13 cross-sections analyzed per session. Comparison of coefficients of variation suggests that analysis of two cross-sections per session is sufficient for a reliable GSA per animal. P-sows and P-gilts were similar in their echogenicity course, but differed from C-gilts. Most noticeable, echogenicity declined in pregnant animals on day 12 po, while it increased in cyclic gilts. In conclusion, the study demonstrates that GSA using transcutaneous ultrasound is a feasible procedure for the determination of uterine echogenicity in the pig, and that pregnant and cyclic pigs differ in the uterine echogenicity, particularly during the time when maternal recognition of pregnancy occurs. Key words: Female pig, Grey-scale analysis, Pregnancy, Ultrasonography, Uterus (J. Reprod. Dev. 56: [444][445][446][447][448] 2010) chogenicity is a valuable parameter in order to define the appearance of a tissue or organ by using B-mode ultrasound. Echogenicity is either described based on a score system, and is rather subjective depending on the assessment of the operator. Alternatively, grey-scale analysis (GSA) is used, which is based on computer-supported pixel quantification and is thus a more objective procedure. In large animal species, GSA has mostly been used to define echogenicity patterns of reproductive tissues such as of testes and accessory glands in growing bulls and rams [1,2], as well as of ovarian structures in mares [3], cows and heifers [4,5], and ewes [6,7]. Also, GSA has been employed for studying endometrial echogenicity in pregnant vs. non-pregnant cows [8][9][10] and the European roe deer [11], and has been advocated as an appropriate procedure for the delineation of uterine diseases in mares [12]. B-mode ultrasound is widely used in pigs too, and is predominantly dedicated to examine genital organs which include the ovaries as well as the pregnant and non-pregnant uterus [13]. While differences in echotexture patterns have been described for the porcine uterus depending on the stage of estrous cycle as well as for the healthy vs. diseased uterus, uterine echogenicity using GSA has never been studied except once in a very preliminarily study on a subset of cyc...

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Artificial Insemination

Parkinson¹,

Morrell²

2019

Veterinary Reproduction and Obstetrics

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Synchronization of estrus and ovulation in sows not conceiving in a scheduled fixed-time insemination program

Cited by 19 publications

References 20 publications

Effects of Feeding Level During Lactation on FSH and LH Secretion Patterns, and Follicular Development in Primiparous Sows

Effects of Feeding Level During Lactation on FSH and LH Secretion Patterns, and Follicular Development in Primiparous Sows

Use of B-mode Ultrasound and Grey-Scale Analysis to Study Uterine Echogenicity in the Pig

Artificial Insemination

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