In this prospective, randomized study, concentrations of gonadotrophins and steroids in pre-ovulatory follicular fluid (FF) and serum were related to type of stimulation protocol as well as to the outcome of assisted reproduction in 280 women subjected to the long protocol gonadotrophin-releasing hormone (GnRH) agonist pituitary down-regulation and ovarian stimulation with either human menopausal gonadotrophin (HMG) or recombinant FSH. In the women treated with HMG, concentrations of LH, FSH, oestradiol and androstenedione in FF were significantly higher, and those of human chorionic gonadotrophin (HCG) and progesterone significantly lower, than in the women treated with recombinant FSH (rFSH). More women became pregnant and delivered in the HMG than in the rFSH group. These differences, however, were not statistically significant. Concentrations of FSH in serum and of FSH and LH in FF were significantly higher in conception than in non-conception cycles, whereas all other hormone concentrations in FF and serum were similar. The present study demonstrates that the pre-ovulatory follicular fluid hormone profile is significantly influenced by the gonadotrophin preparation used for ovarian stimulation, and suggests that ovarian stimulation with HMG results in an intra-follicular hormone profile more similar to that characterizing conception cycles than stimulation with rFSH. However, as the present data represent means of FF hormone profiles, they do not allow the conclusion of a direct correlation between the intra-follicular concentration of a certain hormone and the ability of the corresponding embryo to implant and establish an ongoing pregnancy.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/s1472-6483(10)61097-8 | DOI Listing |
Mol Cell Endocrinol
January 2025
Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY, USA; Reproductive Medicine Associates of New York, Department of Obstetrics, Gynecology and Reproductive Science, Division of Reproductive Endocrinology and Infertility, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
The purpose of this study was to examine the deposition of advanced glycation end products (AGEs) and their receptors, RAGE, in ovarian follicles during folliculogenesis in mice fed high (H-AGE) or low (L-AGE) AGE diets and following superovulation with gonadotropins. We hypothesize that H-AGE diet is associated with increased AGE deposition and RAGE expression in various stages of ovarian follicular development, and superovulation with gonadotropins may alter these changes. C57BL/6J mice were fed low L-AGE (n = 10) or H-AGE (n = 10) diet for 12 weeks.
View Article and Find Full Text PDFSci Rep
December 2024
Departments of Animal and Food Sciences, Biological Sciences, Medical and Molecular Sciences, and Microbiology Graduate Program, University of Delaware, Newark, DE, USA.
The transcriptional regulation of gene expression in the latter stages of follicular development in laying hen ovarian follicles is not well understood. Although differentially expressed genes (DEGs) have been identified in pre-recruitment and pre-ovulatory stages, the master regulators driving these DEGs remain unknown. This study addresses this knowledge gap by utilizing Master Regulator Analysis (MRA) combined with the Algorithm for the Reconstruction of Accurate Cellular Networks (ARACNe) for the first time in laying hen research to identify master regulators that are controlling DEGs in pre-recruitment and pre-ovulatory phases.
View Article and Find Full Text PDFPoult Sci
January 2025
Departments of Animal & Food Sciences, Biological Sciences, Medical & Molecular Sciences, and Microbiology Graduate Program, University of Delaware, Newark, DE, 19716, USA. Electronic address:
Hum Reprod
January 2025
Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, PR China.
Study Question: What molecular mechanisms underlie the decline in ovarian reserve as the number and quality of oocytes decrease in patients with ovarian endometriomas (OEM)?
Summary Answer: Elevated expression of the let-7 micro(mi)RNAs in the follicular microenvironment of OEM-affected ovaries targets the expression of type 1 insulin-like growth factor receptor (IGF1R) in granulosa cell (GC) and disrupts their proliferation, steroid hormone secretion levels, adenosine triphosphate (ATP) energy metabolism, and reactive oxygen species (ROS) oxidative stress levels.
What Is Known Already: Patients with OEM exhibit diminished ovarian reserve, characterized by reduced oocyte quantity and quality. Fibrotic changes in the ovarian tissue surrounding the OEM create a disruptive microenvironment for follicular growth and development.
PLoS One
October 2024
Department of Sport Sciences, School of Education and Psychology, Shiraz University, Shiraz, Iran.
Aim: This study aimed to investigate the effects of the two pre-ovulatory and mid-luteal phases of the menstrual cycle on cognitive function, as well as possible mediators of metabolism and salivary cortisol, at rest and after an aerobic exercise session.
Study Design: Twelve active young unmarried women aged 22-30 years volunteered to participate in the study. The participants performed a 20-min exercise session on a cycle ergometer at 60-70% of their reserve heart rate twice, during the follicular (pre-ovulation: days 7-10) and luteal (mid-luteal: days 21-24) phases of the menstrual cycle.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!