Publications by authors named "Koen C van Zomeren"
Study Question: Does FSH induce free radical generation with substantial oxidative damage in human cumulus granulosa cells (cGCs) and mural granulosa cells (mGCs)?
Summary Answer: FSH of both physiological and supraphysiological concentrations induced free radical generation on subcellular levels, most notably in the mitochondria, while the elevated free radical load caused neglectable oxidative damage in both cGCs and mGCs.
What Is Known Already: FSH is fundamental for regulation of granulosa cell (GC) function and oocyte maturation, during which a physiological level of reactive oxygen species (ROS) is essential, while excessive amounts lead to oxidative damage. Potential adverse effects of high FSH doses on GCs may be mediated by ROS.
Study Question: Does lifestyle intervention consisting of an energy-restricted diet, enhancement of physical activity and motivational counseling prior to IVF improve embryo utilization rate (EUR) and cumulative live birth rate (CLBR) in women with obesity?
Summary Answer: A 6-month lifestyle intervention preceding IVF improved neither EUR nor CLBR in women with obesity in the first IVF treatment cycle where at least one oocyte was retrieved.
What Is Known Already: A randomized controlled trial (RCT) evaluating the efficacy of a low caloric liquid formula diet (LCD) preceding IVF in women with obesity was unable to demonstrate an effect of LCD on embryo quality and live birth rate: in this study, only one fresh embryo transfer (ET) or, in case of freeze-all strategy, the first transfer with frozen-thawed embryos was reported. We hypothesized that any effect on embryo quality of a lifestyle intervention in women with obesity undergoing IVF treatment is better revealed by EUR and CLBR after transfer of all fresh and frozen-thawed embryos.