Search for dissertations about: "human embryo implantation"
Showing result 16 - 20 of 23 swedish dissertations containing the words human embryo implantation.
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16. The fate of primary aneuploid cells in early embryonic development and stem cells
Abstract : Chromosomal aberrations occurring during gametogenesis and early embryonic development play a significant role in infertility and fetal loss in humans. Germ cells that have an abnormal number of chromosomes (aneuploidy) are generated mainly due to errors during female gamete formation, a phenomenon increasing in occurrence with age. READ MORE
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17. Progesterone receptor modulators in contraception : clinical implications of ovarian and endometrial effects
Abstract : Background: Emergency contraception (EC) offers a last chance to prevent an unwanted pregnancy after unprotected sexual intercourse (UPSI) but before pregnancy occurs, for example after contraceptive failure, non-use of contraception or after rape. Progesterone receptor modulators (PRMs) exert their effect through acting as partial antagonists and partial agonists of the progesterone receptor (PR) and have proven effective for EC in low doses by postponing or inhibiting ovulation if it was taken preovulatory in the menstrual cycle. READ MORE
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18. New micromanipulative techniques in reproductive biology
Abstract : New micro manipulative techniques have facilitated development to help patients who suffer from infertility and spontaneous abortion, as well as those who carry severe genetic diseases and have risks of delivering an affected child. Preimplantation genetic diagnosis (PGD), which is based on obtaining blastomere biopsy from an eight-cell embryo, has made it possible to diagnose severe defects caused by a genetic factor. READ MORE
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19. Functional Studies on the PDGFR α gene promoter and effects of autocrine PDGF-A stimulation in vivo
Abstract : Platelet-derived growth factor receptor α (PDGFRα) plays an important role during embryogenesis. After implantation, the patterns of expression of Pdgfrα and its ligand Pdgf-A undergo an "autocrine-paracrine transition", in that Pdgf-A becomes expressed in the ectoderm and epithelia, while Pdgfrα is expressed in the adjacent mesenchymal tissue. READ MORE
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20. Endocrine and paracrine factors related to pregnancy and infertility
Abstract : Unexplained infertility, one of the common gynecological disorders, affecting 10 to 15 % of women worldwide. Recurrent pregnancy loss affects approximately 1 to 3 % of pregnant women with an unknown etiology in 50 % of cases. Endocrine dysfunctions, including thyroid dysfunction, are one of the related factors to female reproductive disturbances. READ MORE