25 research outputs found
Perinatal outcome of induced and spontaneous pregnancies of primiparous women aged 35 or over
To compare the neonatal and maternal morbidity data associated with induced or naturally conceived pregnancies of primiparous women aged 35 years and older. Methods: We recruited primiparous women aged 35 years and older, who delivered between January 1995 and December 2000. The outcomes of the induced (n = 62) and naturally conceived (n = 132) pregnancies were compared. The Fisher exact test was used for univariate analysis in order to compare the delivery and pregnancy characteristics in the two groups. Results: Cesarean section featured with a 0.76 times lower prevalence among the induced pregnant women, than among the spontaneous ones, but the difference was not significant statistically. The induced pregnancies were not associated with a significantly higher rate of perinatal complications. Conclusions: Induced pregnancy does not involve a higher risk of maternal complications. The incidence of premature newborns and intrauterine growth retardation was high in both subgroups, but without a statistically significant difference. (C) 2002 International Federation of Gynecology and Obstetrics. All rights reserved
Risk factors for cesarean section of primiparous women aged over 35 years
Background. To determine the perinatal outcome of pregnancy in primiparous women over 35 years of age and to evaluate determinants predicting cesarean delivery in these women. Methods. Two hundred and seven mothers aged at least 35 years (1.8% of the total deliveries) delivered in the Department of Obstetrics and Gynecology between 1995 and 2000. These women were matched with women aged 20-29 years according to gravidity. Multiple logistic regression analysis was used to evaluate the risk of cesarean delivery, with controls for possible confounding factors. Results. Cesarean section was 2.09-fold more prevalent among the older than among the younger women; the difference being significant (odds ratio, OR=3.36, 95%CI 2.22-5.09; p<0.001). The advanced maternal age was associated with a significantly higher rate of assisted reproductive techniques involvement (OR 6.54; 95%CI 3.54-12.38; p<0.001). The difference between the rates of preeclampsia in the two groups did not reach the level of significance (OR 1.85; 95%CI 1.02-3.34; p=0.056). There were no significant differences in perinatal outcome between the two groups. The logistic regression model demonstrated an increased risk of cesarean section among the primiparous women aged over 35 years. Conclusions. The risk of cesarean section at this advanced age is 6.54-fold. The determinants are included in the pregnancy, delivery and neonatal outcome
Temperature cross-section features in an urban area
This study examines the connection between the built-up urban surface and near-surface air
temperature. The studied city ŽSzeged, Hungary. is located on a low and flat flood plain with a
population of 160,000. Data were collected by mobile measurements under different weather
conditions between March 1999 and February 2000. The efforts have been focussed on investigating
the maximum development of the urban heat island ŽUHI. along an urban cross-section.
According to the results, the UHI intensity changed according to season and month, as a
consequence of the prevailing weather conditions. The role of cloudiness and wind speed on the
temporal variation of the largest UHI, which represents the increasing effect of Szeged on
temperature, is clearly recognized during most of the time in the studied period. The seasonal
profiles follow remarkably well the general cross-section of the typical UHI described by Oke
ŽOke, T.R., 1987. Boundary Layer Climates. Routledge, London. who defines its characteristic
parts as ‘cliff’, ‘plateau’ and ‘peak’. The usefulness of the normalized values in the investigation
is proved, the form of the seasonal mean UHI profile is independent of the seasonal climatological
conditions, and is determined to a high degree by urban surface factors. As a conclusion, we
suggest a modified model describing the metropolitan temperature variable for cities situated in
simple geographical conditions: it is equal to the sum of components of the basic climate of the
region and of the production of urbanization at the surface, where this last term is a multiplication
of weather and urban surface factors
Microwave-assisted synthesis of α-aminophosphine oxides by the Kabachnik–Fields reaction applying amides as the starting materials
A series of acylated α-aminophosphine oxides were synthesized by the microwave-assisted Kabachnik-Fields reaction of a series of carboxylic acid amides, formaldehyde and secondary phosphine oxides. To compensate the lower reactivity of the -NH2 reagents, they had to be used in an excess. The solvolytic condensations furnished the α-aminophosphine oxides in yields of 58-93% after purification by chromatography.</p