Search for dissertations about: "embryo selection"

Showing result 1 - 5 of 14 swedish dissertations containing the words embryo selection.

  2. 1. Elective single embryo transfer

    Author : Ann Thurin-Kjellberg; Göteborgs universitet; []
    Keywords : In vitro fertilization; elective single embryo transfer; multiple pregnancies; randomized; controlled trial; prediction of IVF outcome; embryo selection; cost-effectiveness analysis;

    Abstract : The aim of the study was to evaluate if the elective single embryo transfer (eSET) strategy couldmaintain delivery rates, with at least one live born child, and at the same time decrease the rate ofmultiple births. A cost-effectiveness analysis was also performed between the elective single embryotransfer (SET) (1+1) and double embryo transfer (DET) (2+0) strategies. READ MORE

  4. 2. Male and female selective mechanisms, reproductive success and gene flow

    Author : Samuel Kiboi; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Växtekologi; Plant ecology; Cucumis sativus.; genetic marker; gene flow; reproduction; embryo abortion; resistance; maternal selection; sexual selection; pollen competition; selection;

    Abstract : In this thesis, I have studied male and female selective mechanisms that can affect plant reproductive success and gene flow. I have focussed on sexually selected traits, mainly pollen competition and maternal sorting mechanisms, for example through non-random ovule abortion. READ MORE

  5. 3. Prediction of embryo viability by morphology and metabolomic profiling

    Author : Aisling Ahlström; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NIR spectroscopy; morphology; blastocyst; IVF; trophectoderm; live birth; metabolomic; embryo;

    Abstract : Abstract The ultimate challenge for all in vitro fertilisation (IVF) clinics is to develop the ability to select for transfer the best single embryo first, from the patient’s cohort of embryos, thereby maximising the chance of pregnancy while the incidence of multiple pregnancies is kept to a minimum and fewer transfer cycles are required. This ambition has driven extensive research and development into methods that can be used to predict embryo viability. READ MORE

  6. 4. Egg size evolution and paternal care in pipefishes

    Author : Inês Braga Gonçalves; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Egg size; embryo development; embryo survival; hypoxia; male quality; mate choice; mating constraints; oxygen; parental care; parental effects; paternal care; reproductive compensation; sex-role reversal; sexual conflict; Syngnathidae; Syngnathus typhle;

    Abstract : In this thesis I explore how sexual selection, sexual conflicts, coevolution with parental care and an environmental selective agent (hypoxia) affect the evolution of different egg characteristics and embryo survival and size in pipefishes (Syngnathidae). In the broad-nosed pipefish, Syngnathus typhle Linnaeus, both sexes prefer to mate with large partners; large females produce more and larger eggs and large males can care for more young, and, as shown in this thesis, invest more per embryo and provide better oxygenation during brooding. READ MORE

  7. 5. Computational methods for assessing chemical risk : focusing on toxicokinetic modelling in zebrafish (danio rerio)

    Author : Ioana C. Chelcea; Patrik L. Andersson; Timo Hamers; Jessica Legradi; Stefan Örn; Carolina Vogs; Nynke Kramer; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; PBTK; Toxicokinetics; Endocrine disruptors; bisphenols; zebrafish; embryo; Toxicology; toxikologi;

    Abstract : New chemicals are constantly produced and large data gaps exist on hazards of currently used industrial chemicals, stressing the need for rapid, ethically sound and cost-efficient hazard assessment methods. Traditional methods for effect assessment based on animal testing, do not meet these requirements and thus the toxicology field has been moving towards the development of new approach methodologies which include in vitro approaches but also computational methods. READ MORE