View clinical trials related to Female Subfertility.
Filter by:Pregnancy rates fall dramatically in women after 35 years undergoing to IVF or ICSI. While ovarian aging obviously plays the major role in this phenomenon, over suppression of endogenous LH concentrations with GnRH agonists or antagonists—an integral part of standard IVF/ ICSI protocols—may also play a pivotal role. Assisted reproduction technology protocols using GnRH agonists have been considered as the standard protocol during the last two decades, but the use of GnRH antagonists offers the opportunity to control the endogenous LH surge in a rapid and more convenient way. LH plays a key role in the intermediate-late phases of folliculogenesis. The presence of receptors for LH in cumulus granulosa cells and its correlation with oocyte maturation has been demonstrated. Although ovarian stimulation is efficiently achieved in most cases by the administration of exogenous FSH alone, specific subgroups of women may benefit from LH activity supplementation during ovarian stimulation. Some authors have found improved outcome with LH activity supplementation in advanced reproductive age women. LH has a number of roles in follicular development, induction of ovulation, completion of meiosis I, early luteinization and the production of progesterone. The efficacy of recombinant human follicle-stimulating hormone (r-hFSH) for ovarian stimulation is well established however, the role of supplementary recombinant human luteinizing hormone (r-hLH) is less clear. Aim of the present study is to evaluate If adding rLH in the late phase of stimulation can benefit in some patient awith repeated implantation failure.
Environmental pollutants might be jointly responsible for increase of infertility among women. Especially endocrin active substances seem to be of particular importance. These substances are chemicals which interfere with the physiological system of humans and animals. They have a negative impact on the endocrine system and disturb the functions of organs whose hormones regulate the male and female reproductive system. It is known that exposition to these chemicals lead to subfertility, infertility, raised abortions, birth defects and ovarian malfunction. Additionally it was shown that human embryos have a decreased cleavage rate after IVF when developing from oocytes with elevated concentrations of environmental pollutants. In this study the main focus concentrates on Nonylphenols (NP). Follicular fluids of women with subfertility will be analyzed by a newly developed principle including HPLC and NMR-Spectroscopy. This enables quantitative and qualitative analysis of enantiomers of NP. The results will allow risk estimations for several endocrine active substances, especially NP. Additionally conclusions concerning the correlation between thes substances and subfertility can be drawn.