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P Rokyta

Publications and source records attributed to P Rokyta.

5 recordsLinked to original sources
PubMed2002

[Fructose and glucose in follicular fluid and serum of women undergoing stimulation in an in vitro fertilization program].

OBJECTIVE: To find out if there is some amount of fructose in the follicular fluid of IVF stimulated patients. If so then to compare fructose and glucose levels with IVF outcome, type of stimulation and infertility factors. DESIGN: Retrospective study. SETTING: Department of Gynaecology and Obstetrics, Charles University, the Czech Republic. METHODS: 202 women undergoing IVF treatment since 11/1999 till 02/2001 were evaluated. We measured a level of fructose and glucose in a sample of serum and follicular fluid (FF) obtained at ovum pick-up. Then the results were compared with the IVF outcome, the length of stimulation and infertility factors. The control group consists of 23 women with a pure andrologic factor of infertility. RESULTS: At the day of pick-up the serum concentration of glucose and fructose taken on an empty stomach is on average 5.43 +/- 1.35 mmol/l and 25.05 +/- 9.26 micrograms/ml compared to 5.26 +/- 1.00 mmol/l and 23.69 +/- micrograms/ml in control group. The concentration of both glucose and fructose in FF correlates with their serum level. The FF concentration of glucose is on average 3.75 +/- 1.32 mmol/l (70% of serum concentration) and fructose 11.34 +/- 5.29 micrograms/ml (48% of serum concentration) by comparison with 3.78 +/- 0.91 mmol/l (73%) and 12.37 +/- 7.06 micrograms/ml (53%) in control group. CONCLUSION: There is a possible influence of follicular fluid saccharides like glucose and fructose in process of fertilization. We derived this hypothesis from studies evaluating the role of saccharides in endometrial secretion, cervical mucous and seminal plasma. We assumed that patients with a successful IVF cycle have a lower fructose concentration in FF. The clinical pregnancy is really mildly lower but this difference is not statistically significant. We confirmed FF fructose is in close correlation with its serum concentration. But we did not confirm the FF glucose and FF fructose concentration is related to the IVF outcome.

Adult↗
PubMed2002

[Analysis of the zona pellucida in human oocytes and embryos in an assisted reproduction program].

OBJECTIVE: Our aim was to design simple method for quantitative evaluation of oocyte and embryo morphology in in vitro fertilization (IVF) programme efforting of embryo implantation prediction to be able to set the optimal number of embryos for transfer for given specific case. This study deals with zona pellucida (ZP)--the one interesting and for oocyte unique structure. The work is the part of comprehensive research of oocyte, zygote and embryo morphology. DESIGN: Prospective study. SETTING: Center of Assisted Reproduction, Department of Gynaecology and Obstetrics, Medical Faculty of Charles University, Pilsen. METHODS: The study includes analysis of 66 microphotography pictures of oocytes, zygotes and embryos of patients who were treated by IVF on our department between September and December 2000. The microphotographs were taken by digital microphotographic system. Analysis of zona pellucida parameters was conducted by image analysis software called AnalySIS, Soft Imaging System GmbH. RESULTS: It was found out the average width of the zona pellucida 18.4 microns +/- 2.1 microns, the minimum width was 12.3 microns a maximum 23.1 microns. CONCLUSION: There was found significant narrower zona pellucida in women who conceived in this IVF cycle then in the women who did not.

Adult↗
PubMed2001

[Meconium and postnatal neurologic handicaps].

OBJECTIVE: A review of meconium pathophysiology and its contribution to the incidence of postnatal neurological handicap. DESIGN: Reviewed article. SETTING: Department of Gynaecology and Obstetrics, Charles University and Faculty Hospital Plzen, Czech Republic. SUBJECT AND METHOD: Meconium can be a cause of infant neurological handicap. Two main pathogenetic pathways are mentioned. 1. Meconium (and its components: bile acids) may have a direct vasoconstrictive effect on umbilical and placental vessels. This way still remains controversial. 2. Meconium as a possible cause of intraamniotic infection results in a release of fetal cytokines (TNF alpha, IL-1 beta, IL-6), which can damage myelinogenesis in periventricular white matter. RESULTS: Meconium in premature labour is a higher risk factor compared to term delivery. 41% of premature infants were diagnosed as having CP when meconium was present compared to 10% in the same group with clear amniotic fluid. The incidence in term pregnancy with meconium present is 0.4% compared to 0.3% in a population without any obstetrical risk. CONCLUSION: Ultrasonographically found periventricular leukomalacia is the most reliable sign of subsequent cerebral palsy or other neurological sequelae.

Amniotic Fluid↗
PubMed2000

[Meconium and its significance].

OBJECTIVE: A review of meconium patophysiology and its contribution to the incidence of perinatal infection. DESIGN: Review article. SETTING: Department of Gynaecology and Obstetrics, Charles University and Faculty Hospital Plzen, Czech Republic. METHOD: The reported incidence of meconium-stained amniotic fluid varies between 7 and 22%. The patophysiology of the presence of meconium in the amniotic fluid is not sufficiently explained. Meconium in fetal bowels is under hormonal and neurol control. The presence of the meconium-stained amniotic fluid was always considered to be a potential risk for the fetal and neonatal well-being. The review is further divided in to three chapters. (II. Meconium and meconium aspiration syndrome, III. Meconium and postnatal neurological handicap). RESULTS AND CONCLUSION: The first chapter on deals with meconium risk in the development of perinatal infection: intraamniotic infection/chorioamnionitis, postnatal endometritis, infection of the abdominal wound after Caesarean and neonatal infection. The incidence of clinical chorioamnionitis is 15% with the presence of meconium compared to 3% in controls. The incidence of puerperal endometritis is 10% in comparison to 3% under normal conditions. Two main mechanisms of development (or coincidence) of intraamniotic infection in the presence of meconium exist. 1) Infection may be a cause of meconium passage. 2A) Alteration of Zn/P ratio in the amniotic fluid can promote bacterial growth. 2B) Meconium attached to macrophages or absorbed by phagocytosis can impair cellular immune response. The antibiotic prophylaxis is discussed.

Amniotic Fluid↗