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Compound Culture Media To Improve Human IVF Pregnancies
Funder
National Health and Medical Research Council
Funding Amount
$254,340.00
Summary
In Australia 1 in 6 couples require IVF to conceive. Although pregnancy rates have improved over the last 10 years the live birth rate in Australia per cycle is only 17%. This project will assess a new method for the culture of embryos for the ability to maintain embryo vitality and produce healthy babies.
Media Formulations To Enhance Embryo Formation In Assisted Reproduction
Funder
National Health and Medical Research Council
Funding Amount
$660,133.00
Summary
The increasing age of parenthood has led to an explosion in the demand for assisted reproductive technologies such as in vitro fertilisation (IVF). This procedure has a poor success rate and is limited by the ability of fertilised eggs to mature into early embryos in the lab prior to being transferred into women. We will develop new compounds that improve embryo growth in the clinic, which will improve IVF success rates.
Oxygen, Oxidative Phosphorylation And Regulation Of Embryo Development.
Funder
National Health and Medical Research Council
Funding Amount
$141,096.00
Summary
There is concern that human infertility treatment requiring the growth of embryos in the laboratory, as applied in human IVF, may cause problems during fetal development or even possibly lead to health problems much later in life as an adult. In particular, many clinics are now growing human embryos outside the body for several days longer (to select the best embryos for transfer) than what occurred a decade ago. This concern is based on the evidence that the environment in which an embryo grows ....There is concern that human infertility treatment requiring the growth of embryos in the laboratory, as applied in human IVF, may cause problems during fetal development or even possibly lead to health problems much later in life as an adult. In particular, many clinics are now growing human embryos outside the body for several days longer (to select the best embryos for transfer) than what occurred a decade ago. This concern is based on the evidence that the environment in which an embryo grows in has an impact on the way in which some genes are switched on and off. Normal on-off switching at appropriate times during early development should lead to healthy offspring. Failure to turn off or on, or inappropriate timing, may lead to consequences that manifest themselves later in development. We believe that oxygen concentration and the activity of mitochondria, the organelles of cells that converts oxygen into energy, are key regulators in turning on and off genes during early embryo development. This is because we have shown that, in embryos of a species that is metabolically similar to the human embryo, oxygen concentration and mitochondria activity need to change as the embryo grows for optimal development in the laboratory. In other mammalian cells, oxygen and mitochondria activity are known to turn on or off several particular genes, known as transcription factors. Transcription factors are genes which regulate other genes. Therefore, transcription factors are good candidates as regulators of early embryo development. The present project aims to determine if factors such as changing oxygen concentration and mitochondria activity during laboratory growth of embryos affects the way in which these transcription factors turn on and off. If we find this is true, the way in which human embryos are grown in the laboratory needs to be examined carefully to minimize the risk of possible long-term consequences to the resulting fetus.Read moreRead less
Reappraisal Of The Mechanisms Underlying Implantation Success Or Failure
Funder
National Health and Medical Research Council
Funding Amount
$750,755.00
Summary
Infertility affects 1:6 Australian couples; these seek help. However, for each IVF cycle, there is only ~18.5% chance of a live birth, significantly due to failure of embryo implantation. We discovered nano-vesicles in the uterine cavity, that are released from the womb lining and taken up by the pre-implantation embryo to improve its implantation potential. We will determine how this extracellular environment can enhance implantation success and circumvent/management of infertility.
Genetic testing of IVF embryos promises to improve success but shows no effect of live-birth rates. Many embryos are mosaic: containing cells with correct and incorrect chromosome numbers. Current testing is an invasive biopsy which fails to diagnose how many cells are abnormal in the cells that develop into the baby. Here we will use imaging to determine the ratio of abnormal:normal cells resulting in a non-invasive diagnostic that will improve IVF success.