ArticleActa veterinaria Scandinavica2018
Extent and pattern of pregnancy losses and progesterone levels during gestation in Swedish Red and Swedish Holstein dairy cows.
Article in Acta veterinaria Scandinavica, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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12 citing papers in PubMed, 41 citations in OpenAlex.
- Reproductive performance and its risk factors in Hanwoo cattle: a large-scale field study.Animal bioscience · 2026Article
- Risk factors for early and mid-to-late pregnancy loss and their effects on reproductive performance in dairy cows.Journal of veterinary science · 2026Article
- Article
- Vascular Alterations in Uterine and Ovarian Hemodynamics and Hormonal Analysis throughout Pregnancy Loss in Cows under Heat Stress.Veterinary sciences · 2024Article
- Evaluation of the effect of sustained-release progesterone injection on the expression of interferon-related genes in repeat-breeder dairy cows.Veterinary medicine and science · 2024Article
- Association between production and reproduction parameters based on parity and breed of dairy cows in the Czech Republic.Archives animal breeding · 2024Article
- BoHV-1 affects abortion and progesterone in dairy cows Bovine alphaherpesvirus 1 (BoHV-1) seropositivity, progesterone levels and embryo loss of 30-day-old pregnant dairy cows in Zagros Industrial Dairy Farm in Shahrekord: Examination and analysis.Veterinary medicine and science · 2023Article
- Administration of GnRH at day 20 of AI and embryonic losses in synchronized crossbred buffalo.Frontiers in veterinary science · 2023Article
- Clinical Overview of Luteal Deficiency in Dairy Cattle.Animals : an open access journal from MDPI · 2022Article
- Changes in selected cytokines, acute-phase proteins, gonadal hormones and reproductive organs of non-pregnant does challenged with Mannheimia haemolytica serotype A2 and its LPS endotoxin.Tropical animal health and production · 2022Article
- Histological and hemodynamic characterization of corpus luteum throughout the luteal phase in pregnant and non-pregnant buffalos in relation to nitric oxide levels based on its anatomical determination.Frontiers in veterinary science · 2022Article
- Pregnancy Loss (28-110 Days of Pregnancy) in Holstein Cows: A Retrospective Study.Animals : an open access journal from MDPI · 2020Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
backgroundPregnancy loss is a major source of infertility in dairy cows. Despite a fertilization rate after insemination (AI) of approximately 90%, calving rates are 30%-50%, indicating the occurrence of extensive embryonic and foetal losses. The aim of this study was to establish the extent and pattern of embryonic and foetal loss in Swedish Red (SR) and Swedish Holstein (SH) dairy cows, as well as, the relationship to oestrus intensity (OI) and progesterone (P4) concentration. In total, 2130 AIs and 16,176 milk P4 samples from 359 SR and 212 SH dairy cows were included in the study. Pregnancy losses were estimated using data from P4 values combined with AI information and calving data.
resultsTotal pregnancy loss from AI to the day of calving was 65%. Early embryonic loss, late embryonic loss and foetal loss were estimated to be 29, 14 and 13%, respectively. There is strong evidence in the literature that P4 concentrations at different time points are associated with pregnancy loss. In the present study, cows with pregnancy losses had significantly higher P4 levels at the day of AI and significantly lower P4 concentration at days 10, 21 and 30 after AI compared to pregnant cows. Swedish Red cows had significantly lower total pregnancy losses compared to SH cows (62% and 68% respectively, P = 0.017). Early embryonic loss was 6.7% points lower for cows inseminated at a stronger OI (OI = 3) compared to at a weaker OI (OI = 2, P = 0.006). Cows inseminated at ovulation number ≥ 5 had significantly lower early pregnancy losses compared to cows inseminated at first or second ovulation (11.5 and 8% points, respectively, P < 0.05). With an increase of one SD of milk (448 kg ECM) during the first 60 days in milk, early embryonic loss increased by 4.7% points (P = 0.006).
conclusionsIt is important to increase the number of cows calving per insemination by reducing embryo/foetal loss. This outcome can be achieved by management and breeding for optimal P4 levels at critical time points, and by considering oestrus expression in the breeding programmes to facilitate the correct timing of insemination.
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