Search for dissertations about: "oocyte maturation"

Showing result 6 - 10 of 16 swedish dissertations containing the words oocyte maturation.

2. 6. Molecular and morphological studies of folliculogenesis, oocyte maturation and embryogenesis in humans

   Author : Maria Lindeberg; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : Infertility is a problem that affects about 15 percent of all couples. Many can be helped by assisted reproductive techniques, but still today many couples are treated without a successful outcome. The reason for infertility is sometimes known, but there are also many cases of unexplained infertility. READ MORE

4. 7. Oocyte maturation in a contaminated environment : effects of perfluoroalkyl substances on bovine early embryo development in vitro

   Author : Ida Hallberg; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Abstract : The content of this thesis is dedicated to female fertility, and more specifically the maturing oocyte. The aim was to investigate chemicals present in the direct environment of the oocyte and more specifically to investigate the sensitivity of the oocyte to perfluoroalkyl substances (PFASs) using a bovine in vitro embryo production model. READ MORE

5. 8. Preservation of fertility through cryopreservation and in vitro maturation of human ovarian follicles and oocytes

   Author : Julius Hreinsson; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Oocyte; maturation in-vitro; cryopreservation; ovarian follicles; culture; IVM; preservation of fertility;

   Abstract : One of the most rapidly expanding fields in assisted reproduction is the preservation of fertility for young women at risk of premature ovarian failure. This may be caused by cytotoxic therapy or other reasons. Cryopreservation of follicles in ovarian tissue has been successful in animal models with live young being born. READ MORE

6. 9. Effects of toxin-producing phytoplankton on copepods: feeding, reproduction and implications to the fate of toxins

   Author : Betina Kozlowsky-Suzuki; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Ekologi; GSH transferase; oocyte development; fate of toxins; toxin accumulation; toxic phytoplankton; copepods;

   Abstract : Phytoplankton growth and loss rates are governed by several factors and in many cases, when growth control fails, algal blooms are established. Such blooms can be formed by different phytoplankton species and some of them have harmful impacts on marine ecosystems. READ MORE

7. 10. Human ovarian follicles and oocytes : collection, cryopreservation, culture and gene expression

   Author : Pu Zhang; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Ovarian follicle; oocyte; follicular aspirate; organ culture; cAMP; cGMP; cryopreservation; microarray; human gene expression; embryonic stem cell; preimplantation;

   Abstract : Infertility affects approximately 15% of couples globally. The most effective treatment today is in vitro fertilization. However, not all couples can be helped with the current techniques. To achieve better success, techniques of storage and in vitro maturation of ovarian follicles have to be improved. READ MORE