A5084167440- Animal Behavior and Welfare Studies
- Reproductive Physiology in Livestock
- Animal Nutrition and Physiology
- Genetic and phenotypic traits in livestock
- Reproductive Biology and Fertility
- Effects of Environmental Stressors on Livestock
- Neuroendocrine regulation and behavior
- Ruminant Nutrition and Digestive Physiology
- Agriculture Sustainability and Environmental Impact
- Adipose Tissue and Metabolism
- Animal Genetics and Reproduction
- Insect and Pesticide Research
- Human-Animal Interaction Studies
- Birth, Development, and Health
- Ovarian function and disorders
- Rabbits: Nutrition, Reproduction, Health
- Meat and Animal Product Quality
- Animal Disease Management and Epidemiology
- Primate Behavior and Ecology
- Muscle metabolism and nutrition
- Wildlife Ecology and Conservation
- Sperm and Testicular Function
- Dermatology and Skin Diseases
- Growth Hormone and Insulin-like Growth Factors
- Reproductive System and Pregnancy
Wageningen University & Research
2016-2025
Institute of Animal Sciences
2020
De Gezondheidsdienst voor Dieren
1993-2007
Utrecht University
2007
Instituut voor Landbouw en Visserijonderzoek
1993
The effects of the timing insemination relative to ovulation on fertilization rate, accessory sperm count and early embryo development were studied in sows. Oestrus detection was performed at intervals 8 h. Sows artificially inseminated once with 3 x 10(9) spermatozoa. Transrectal ultrasonography 4 h determine when occurred sows killed 120 +/- 6 after ovulation. For each insemination-ovulation interval h, rates as follows: > 48 35% (n = 1); 48-40 51 36% 6); 40-32 54 14); 32-24 79 32% 19);...
Data from two experiments were used to study the relationship between weaning-to-estrus interval (WEI, varying 3 6 d) and duration of estrus, onset estrus ovulation fertilization results at 120 h after ovulation, in 201 multiparous sows. An increase WEI resulted a decrease (Duration (h) = [81 (exp1) or 88 (exp2)]-.33 x WEI, R2 .25, P < .001) (onset [54 59 (exp2)]-.20 .23, .001). Sows that inseminated 0 24 before showed consistent high (91% normal embryos), irrespective WEI. outside this...
This review describes effects of variation in the interval between insemination and ovulation on fertilization process sow. Inseminations performed too early or late relative to decrease litter size especially farrowing rate. effect can be explained a large extent by increase percentage non-fertilized eggs, resulting partial no at all. No from are found degenerate embryos. Only moderate mean embryonic development day 5 after insemination. In general, 0 24 h before gives good results. Factors...
Constipation is a common problem in sows and women during late pregnancy. Dietary fiber has potential the regulation of intestinal microbiota, thereby promoting motility reducing constipation. However, effects fibers with different physicochemical properties on microbe constipation pregnancy have not been fully explored. In this study, total 80 were randomly allocated to control one three dietary treatments from day 85 gestation delivery: LIG (lignocellulose), PRS (resistant starch), KON...
Our objective was to study the effects of dietary-induced insulin enhancement during and after lactation on reproductive performance primiparous sows. During a 21-d period, 48 sows were allotted 2 × factorial experiment. Treatments feeding level (high or low; 44 MJ 33 NE/d) dietary energy source (fat starch). After weaning, all received same amount feed (31 NE/d from weaning estrus 17.5 breeding until slaughter) as fed lactation. On d 7, 14, 21 22 (weaning), blood samples taken every 12 min...
This research was conducted to determine factors that influence duration of estrus, AI strategy, and reproduction results between within commercial swine farms use AI. Data from 15,186 sows gilts on 55 for a period 6.1±4.2 mo per farm were used in this study. The average estrus 48.4±1.0 h, ranging 31 64 consistent month (repeatability 86%). Differences accounted 23% the total variation estrus. On most (n = 45), showed shorter (P < .05) than (40.8±1.1 h vs 48.5±1.0 h). first after weaning...
The timing of oestrus, the concentrations oestradiol, LH and progesterone, embryo survival on day 35 pregnancy in 16 weaned multiparous sows were studied relation to moment ovulation. Ovulation was detected using transrectal ultrasonography. interval between weaning ovulation varied 126 214 h (156 ± 29). peak oestradiol concentration 27 17 pg ml−1; with a shorter had higher peaks (r = −0.54, P 0.02). 11 4 h. shape, width height surge variable, but did not influence ovulation, which 26 34 (30...
Piglet birth weight and litter uniformity were studied in sows of different parities crossbred lines relation to: 1) weaning-to-pregnancy interval (WPI) 2) sow body condition changes (in BW backfat thickness) during lactation gestation with a short WPI (≤7d). At the Institute for Pig Genetics (IPG) research farm, individual piglet weights (BW thickness at farrowing weaning) measured 949 TOPIGS20 889 TOPIGS40 >4 total born piglets, inseminated between 2003 2011. In all analyses, mean SD CV...
This study compared the development until 9 wk of age piglets raised in either a multi-litter (ML) system or conventional single-litter (SL) system. The ML consisted multi-suckling with 5 sows and their litters before weaning, followed by housing pen enrichment group 40 after weaning. In SL system, were housed crated sow postweaning groups 10 littermates standard pen. Fifty used batches weaned at 4 age. Preweaning mortality was higher than (3.22 ± 0.42 vs. 1.52 0.25 per litter, < 0.01),...
Abstract Metabolic demands of modern hybrid sows have increased over the years, which increases chance that enter a substantial negative energy balance (NEB) during lactation. This NEB can influence development follicles and oocytes will give rise to next litter. To study effects lactational on follicular development, we used 36 primiparous 18 were subjected feed restriction (3.25 kg/day) full-fed (6.5 last 2 weeks 24.1 ± 0.3 day Feed resulted in 70% larger body weight loss 76% higher...