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

Kauffold, Johannes; Gottschalk, J.; Schneider, Falk; Beynon, Neville; Wähner, M.

doi:10.1111/j.1439-0531.2007.00880.x

Cited by 22 publications

(16 citation statements)

References 22 publications

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“…Eissen et al (2000) emphasized the importance of a high feed intake; the lactating sow cannot eat enough to fully meet the requirements. An unsatisfying, low feed intake affects reproductive hormone levels, such as luteinizing hormone and folliclestimulating hormone, and follicular growth during lactation (Kauffold et al, 2008).…”

Section: Genetics Of Reproduction and Correlation With Piglet Growthmentioning

confidence: 99%

Genetic analysis of reproductive performance in Landrace sows and its correlation to piglet growth

et al. 2010

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Section: Genetics Of Reproduction and Correlation With Piglet Growthmentioning

confidence: 99%

Genetic analysis of reproductive performance in Landrace sows and its correlation to piglet growth

et al. 2010

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“…FSH concentrations were determined in the first two blood samples by RIA following the procedure described by Kauffold et al [24]. The limit of detection was 0.4 ng/mL, and the intra-and interassay coefficients of variation (CVs) were 6.4% and 10.6%, respectively.…”

Section: Fsh and P4 Concentrationsmentioning

confidence: 99%

Effect of a GnRH analogue (Maprelin) on the reproductive performance of gilts and sows

Jong

Kauffold²,

Engl³

et al. 2013

Theriogenology

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a b s t r a c tThe ability of peforelin (l-GnRH-III) to stimulate follicular growth, FSH release, and estrus in gilts after altrenogest treatment and in sows after weaning was investigated. In three farrow-to-wean herds, with at least 600 sows and average production performance, 216 gilts, 335 primiparous, and 1299 pluriparous sows were randomly allocated to three treatments: peforelin (M group: Maprelin), eCG (F group: Folligon), and physiological saline solution (C group). Animals were treated 48 hours after their last altrenogest treatment (gilts) or 24 hours after weaning (sows). The weaning-to-estrus interval, estrus duration, estrus rate (ER), pregnancy rate, and total born (TB), live born, and stillborn (SB) numbers were recorded and compared between treatments for the different parity groups (gilts and primiparous and pluriparous sows). Follicle sizes were measured in representative animals from each group on the occasion of their last altrenogest treatment or at weaning, and also on the occasions of their first (FS1) and second (FS2) attempted inseminations. Blood samples were taken to determine FSH concentrations at weaning and 2 hours after injection, and progesterone concentrations 10 days after the first insemination attempt. The relative change in FSH concentrations was calculated. Significant differences were found for ER within 7 days of weaning in pluriparous sows (95%, 91%, and 90% for the M, F, and C groups, respectively, P ¼ 0.005). Gilts in the F-group had high TB numbers, and pluriparous sows in the M group had high SB numbers (TB gilts ¼ 13.6, 15.4, and 14.9 [P ¼ 0.02] and SB pluriparous sows ¼ 1.8, 1.4, and 1.7 [P ¼ 0.05] for the M, F, and C groups, respectively). The M group had the highest FS1 (for gilts) and FS2 (for pluriparous sows) values: FS1 ¼ 5.4, 4.9, and 4.9 mm [P ¼ 0.02] and FS2 ¼ 6.8, 5.3, and 6.3 mm [P ¼ 0.03] for the M, F, and C groups, respectively. There were no significant differences between the different treatments within each parity group with respect to any of the other variables. Overall, peforelin treatment had small but positive effects on the ER and follicle growth in certain parity groups but did not seem to affect litter sizes or FSH and progesterone levels in sows on the occasions of the corresponding examinations.

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“…Nutritional manipulation can modulate endocrinology of reproduction in lactating sows (Barb et al., 2001; Kauffold et al., 2008). In this study, dietary glucose inclusion resulted in increased insulin concentrations at post‐farrowing and weaning, but failed to affect the LH characteristics.…”

Section: Discussionmentioning

confidence: 99%

ORIGINAL ARTICLE: Effects of dietary glucose inclusion on reproductive performance, milk compositions and blood profiles in lactating sows

Park

Yang

Shinde

et al. 2010

Journal of Animal Physiology and Animal Nutrition

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Twenty-four multiparous sows were used to investigate the effects of dietary glucose inclusion on reproductive performance, milk compositions, blood metabolites and hormones during lactation. The sows were randomly assigned to four treatments and each treatment had six replicates (sows). The diets were added with 0%, 1%, 3% or 5% glucose at the expense of corn and fed to sows for 24 days. The loss of backfat thickness during lactation was quadratically decreased (p = 0.008) and the wean-to-oestrus interval was shortened (linear, p = 0.013; quadratic, p = 0.009) with increasing levels of dietary glucose supplementation. The reproductive performance was not affected (p > 0.05) by different dietary glucose contents. Increased concentrations of total solid and fat in milk were noted (p < 0.05), whereas there was no difference on colostrum compositions. With increasing levels of dietary glucose inclusion, the concentrations of blood urea nitrogen (p = 0.004) and glucose (p = 0.029) were linearly increased at weaning. The concentrations of insulin were increased at post-farrowing (linear, p = 0.027; quadratic p = 0.013) and weaning (linear, p = 0.029; quadratic, p = 0.017), respectively. Furthermore, the pulses of insulin and FSH at weaning were linearly (p = 0.049) and quadratically (p = 0.015) increased with the increasing levels of dietary glucose inclusion. In conclusion, this study indicated that inclusion of 3% glucose in lactating diet could reduce backfat loss, increase milk fat and have no negative effect on reproductive performance in multiparous sows.

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

Cited by 22 publications

References 22 publications

Genetic analysis of reproductive performance in Landrace sows and its correlation to piglet growth

Genetic analysis of reproductive performance in Landrace sows and its correlation to piglet growth

Effect of a GnRH analogue (Maprelin) on the reproductive performance of gilts and sows

ORIGINAL ARTICLE: Effects of dietary glucose inclusion on reproductive performance, milk compositions and blood profiles in lactating sows

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