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Sökning: WFRF:(Nylund L)

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  • 2017
  • swepub:Mat__t
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  • Hultling, C, et al. (författare)
  • Assisted ejaculation combined with in vitro fertilisation : an effective technique treating male infertility due to spinal cord injury.
  • 1994
  • Ingår i: Paraplegia. - : Springer Science and Business Media LLC. - 0031-1758. ; 32:7, s. 463-467
  • Tidskriftsartikel (refereegranskat)abstract
    • Infertility due to spinal cord injury (SCI) in males has been identified for decades as an area of major concern and techniques for assisted ejaculation are available. There has not been an overall consensus regarding which type of assisted procreation is the most appropriate for these couples. We describe here our experience from a programme based on assisted ejaculation combined with in vitro fertilization (IVF). Twelve couples have been treated so far and altogether 22 cycles with ovum pick-up have been completed. Fertilisation of the oocytes was obtained in 18 of these cycles. The overall oocyte fertilisation rate was 49%. Embryo transfer took place in 17 cycles, leading to seven clinical pregnancies. Four of the pregnancies are delivered or are ongoing, whereas three ended in first trimester spontaneous abortion. Thus our initial experience suggests that assisted ejaculation in combination with IVF is an effective option for these couples.
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  • Heuschele, J., et al. (författare)
  • The sex specific metabolic footprint of Oithona davisae
  • 2016
  • Ingår i: Journal of Sea Research. - : Elsevier BV. - 1385-1101. ; 117, s. 1-6
  • Tidskriftsartikel (refereegranskat)abstract
    • In pelagic copepods, the group representing the highest animal abundances on earth, males and females have distinct morphological and behavioural differences. In several species female pheromones are known to facilitate the mate finding process, and copepod exudates induce changes in physiology and behaviour in several phytoplankton species. Here we tested whether the sexual dimorphism in morphology and behaviour is mirrored in the exudate composition of males and females. We find differences in the exudate composition, with females seemingly producing more compounds. While we were able to remove the sex pheromones from the water by filtration through reverse phase solid phase extraction columns, we were not able to recover the active pheromone from the solid phase. © 2016 Elsevier B.V.
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  • Berdan, Emma L, 1983, et al. (författare)
  • Genetic divergence and phenotypic plasticity contribute to variation in cuticular hydrocarbons in the seaweed fly Coelopa frigida
  • 2019
  • Ingår i: Ecology and Evolution. - : Wiley. - 2045-7758. ; 9:21, s. 12156-12170
  • Tidskriftsartikel (refereegranskat)abstract
    • Cuticular hydrocarbons (CHCs) form the boundary between insects and their environments and often act as essential cues for species, mate, and kin recognition. This complex polygenic trait can be highly variable both among and within species, but the causes of this variation, especially the genetic basis, are largely unknown. In this study, we investigated phenotypic and genetic variation of CHCs in the seaweed fly, Coelopa frigida, and found that composition was affected by both genetic (sex and population) and environmental (larval diet) factors. We subsequently conducted behavioral trials that show CHCs are likely used as a sexual signal. We identified general shifts in CHC chemistry as well as individual compounds and found that the methylated compounds, mean chain length, proportion of alkenes, and normalized total CHCs differed between sexes and populations. We combined these data with whole genome resequencing data to examine the genetic underpinnings of these differences. We identified 11 genes related to CHC synthesis and found population-level outlier SNPs in 5 that are concordant with phenotypic differences. Together these results reveal that the CHC composition of C. frigida is dynamic, strongly affected by the larval environment, and likely under natural and sexual selection.
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