Publications by authors named "Nienke van Hoogenhuijze"
Article Synopsis
- This study looked at why some good-quality embryos fail to implant after IVF, by examining the endometrial tissue (the lining of the uterus) of women who had unsuccessful cycles.
- Scientists collected samples from 107 women and used special techniques to analyze the genes in the endometrium to see if they could predict whether the embryos would successfully implant or not.
- They found that understanding the gene activity in the uterus could help make better decisions for treating infertility in the future.
Background: In IVF/ICSI treatment, the process of embryo implantation is the success rate-limiting step. Endometrial scratching has been suggested to improve this process, but it is unclear if this procedure increases the chance of implantation and live birth (LB) and, if so, for whom, and how the scratch should be performed.
Objective And Rationale: This individual participant data meta-analysis (IPD-MA) aims to answer the question of whether endometrial scratching in women undergoing IVF/ICSI influences the chance of a LB, and whether this effect is different in specific subgroups of women.
Article Synopsis
- The study investigates how steroid concentrations in endometrial tissue and serum relate to gene expression of steroid-metabolizing enzymes to assess endometrial receptivity in IVF patients.
- It involves a case-control design with 40 IVF patients, comparing 20 women who achieved clinical pregnancy to 20 who did not, while controlling for various factors like fertility type and age.
- Results show no overall differences in steroid levels between pregnant and nonpregnant groups, but pregnant women with primary infertility had lower estrone levels and a distinct estrone:androstenedione ratio compared to their nonpregnant counterparts.
The endometrial microbiota composition may be associated with implantation success. However, a 'core' composition has not yet been defined. This exploratory study analysed the endometrial microbiota by 16S rRNA sequencing (V1-V2 region) of 141 infertile women whose first IVF/ICSI cycle failed and compared the microbiota profiles of women with and without a live birth within 12 months of follow-up, and by infertility cause and type.
View Article and Find Full Text PDFResearch Question: Can organoids be established from endometrial tissue of infertile women and does tissue cryopreservation allow for establishment of organoids comparable to organoids derived from freshly biopsied endometrial tissue?
Design: Endometrial tissue was obtained from six infertile women through minimally invasive biopsy using a Pipelle catheter and subjected to organoid development, immediately after biopsy as well as after tissue cryopreservation. Organoid formation efficiency, morphology, expandability potential, endometrial marker expression (immunostaining and reverse transcription quantitative real-time polymerase chain reaction) and hormonal responsiveness (after oestradiol and progesterone treatment) were assessed.
Results: Organoids established from both fresh and frozen tissue at comparable efficiency could be passaged long-term and showed similar morphology, i.
Introduction And Hypothesis: Internal closure of the urethral sphincter is one of the mechanisms in maintaining continence. Little is known about changes in the urethral sphincter during pregnancy. We designed this study to develop a reliable method to measure the area and mean echogenicity of the midurethra during and after pregnancy and to assess changes over time.
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