Influence of fetal birth weight on perinatal outcome in planned vaginal births.

OBJECTIVE: The aim of this study was to provide information for better obstetric counseling by analyzing the impact of fetal birth weight (BW) on fetal and maternal outcome when vaginal birth is planned in a university hospital. METHODS: In this retrospective study from January 1st 2006 to December 31st 2011, 5,177 singleton, alive deliveries at or >37 gestational weeks were assessed with regard to the fetal BW when vaginal birth was attempted. The normal BW group was defined as ≥2,500 <4,500 g. For comparison, further BW groups were defined as: group 1 <2,500 g, group 2 ≥4,000 <4,250 g, group 3 ≥4,250 <4,500 g and group 4 ≥4,500 g. Outcome criteria were mode of delivery and perineal lacerations as well as the pH and base excess of the umbilical cord artery, the Apgar score after 5 min and occurrence of shoulder dystocia. The set of controlling variables included maternal height, maternal weight, maternal age, gestational age, neonatal sex and parity. RESULTS: Second stage caesarean section is significantly more likely when fetal BW is under 2,500 g (30.7 vs. 15.5 % in the normal BW group, odds ratio 3.01, 95 % confidence interval 2.03-4.46, p value < 0.001). Shoulder dystocia occurred significantly more often when fetal BW was over 4,250 g (group 3: odds ratio 4.95, 95 % confidence interval 1.74-14.10, p value 0.003, group 4: odds ratio 19.96, 95 % confidence interval 7.61-52.38, p value < 0.001). The risk of an Apgar score after 5 min below 7 increased, when fetal BW was below 2,500 g (odds ratio 9.28, 95 % confidence interval 3.15-27.35, p value < 0.001) or above 4,500 g (odds ratio 5.65, 95 % confidence interval 1.22-26.24, p value 0.027). All groups were comparable to the normal group regarding pH and base excess of the umbilical cord artery as well as the risk for severe (third and fourth degree) perineal lacerations. CONCLUSION: Although a fetal birth weight under 2,500 g and a birth weight over 4,250 g are associated with some risks, there is no general contraindication for an attempt to deliver vaginally in a university hospital with regard to fetal birth weight.

Influence of Fetal Birth Weight on Caesarean Section Rate and Fetal Outcome After Induction of Labor.

AIM: The aim of the present study was to provide information for better obstetric counselling by analyzing the impact of fetal birth weight on the caesarean section rate and fetal outcome after induction of labor. MATERIALS AND METHODS: In this retrospective study from January 2010 to December 2013, 1,474 singleton deliveries with labor induction at or greater than 37 gestational weeks were analyzed for their impact of fetal birth weight on delivery outcome. The normal birth weight group was defined as 2,500 g to less than 4,000 g. For comparison, further birth weight groups were defined as: group 1 <2,500 g, group 2 4,000 to <4,250 g; group 3 ≥4,250 g. The primary outcome was the caesarean section rate; secondary outcome measures were fetal complications monitored by pH and base excess (BE) of the umbilical cord artery, Apgar score after 5 min (Apgar-5) and postpartum transfer to the Neonatal Care Unit. The set of controlling variables included maternal body mass index and age, gestational age, neonatal sex, maternal diabetes, maternal hypertension disorder, parity and method of induction of labor. RESULTS: Second-stage caesarean section is significantly more likely when fetal birth weight is below 2,500 g (42.9% vs. 24.2% in the normal birth weight group, odds ratio=3.11, 95% confidence interval=1.48-6.51, p=0.003). A birth weight of 4,000 g or more did not have a significant influence on the caesarean section rate. Only the mean Apgar-5 for group 1 was significantly lower (p=0.044). The non-parametric tests and regression analyzes of pH and BE of the umbilical cord and of the Apgar-5 for adverse fetal outcome (pH<7.05, BE<-12 or Apgar-5 <7) showed no significant differences in the three birth weight groups when compared to the normal group. Neonates were significantly more often transferred to the Neonatal Care Unit after delivery when birth weight was below 2,500 g (odds ratio=9.68, 95% confidence interval=4.33-21.65, p<0.001) or above 4,250 g (odds ratio=2.68, 95% confidence interval=1.34-5.36, p=0.005). CONCLUSION: Although a fetal birth weight of under 2500 g and a birth weight over 4,250 g are associated with some risks, there is no general contraindication against performing induction of labor in regards to fetal birth weight.

Microtubule Associated Protein 1b (MAP1B) Is a Marker of the Microtubular Cytoskeleton in Podocytes but Is Not Essential for the Function of the Kidney Filtration Barrier in Mice.

Podocytes are essential for the function of the kidney glomerular filter. A highly differentiated cytoskeleton is requisite for their integrity. Although much knowledge has been gained on the organization of cortical actin networks in podocyte's foot processes, less is known about the molecular organization of the microtubular cytoskeleton in primary processes and the cell body. To gain an insight into the organization of the microtubular cytoskeleton of the podocyte, we systematically analyzed the expression of microtubule associated proteins (Maps), a family of microtubules interacting proteins with known functions as regulator, scaffold and guidance proteins. We identified microtubule associated protein 1b (MAP1B) to be specifically enriched in podocytes in human and rodent kidney. Using immunogold labeling in electron microscopy, we were able to demonstrate an enrichment of MAP1B in primary processes. A similar association of MAP1B with the microtubule cytoskeleton was detected in cultured podocytes. Subcellular distribution of MAP1B HC and LC1 was analyzed using a double fluorescent reporter MAP1B fusion protein. Subsequently we analyzed mice constitutively depleted of MAP1B. Interestingly, MAP1B KO was not associated with any functional or structural alterations pointing towards a redundancy of MAP proteins in podocytes. In summary, we established MAP1B as a specific marker protein of the podocyte microtubular cytoskeleton.

Finding the most accurate method to measure head circumference for fetal weight estimation.

OBJECTIVE: Accurate measurement of fetal head biometry is important for fetal weight estimation (FWE) and is therefore an important prognostic parameter for neonatal morbidity and mortality and a valuable tool for determining the further obstetric management. Measurement of the head circumference (HC) in particular is employed in many commonly used weight equations. The aim of the present study was to find the most accurate method to measure head circumference for fetal weight estimation. STUDY DESIGN: This prospective study included 481 term pregnancies. Inclusion criteria were a singleton pregnancy and ultrasound examination with complete fetal biometric parameters within 3 days of delivery, and an absence of structural or chromosomal malformations. Different methods were used for ultrasound measurement of the HC (ellipse-traced, ellipse-calculated, and circle-calculated). As a reference method, HC was also determined using a measuring tape immediately after birth. FWE was carried out with Hadlock formulas, including either HC or biparietal diameter (BPD), and differences were compared using percentage error (PE), absolute percentage error (APE), limits of agreement (LOA), and cumulative distribution. RESULTS: The ellipse-traced method showed the best results for FWE among all of the ultrasound methods assessed. It had the lowest median APE and the narrowest LOA. With regard to the cumulative distribution, it included the largest number of cases at a discrepancy level of ±10%. The accuracy of BPD was similar to that of the ellipse-traced method when it was used instead of HC for weight estimation. CONCLUSION: Differences between the three techniques for calculating HC were small but significant. For clinical use, the ellipse-traced method should be recommended. However, when BPD is used instead of HC for FWE, the accuracy is similar to that of the ellipse-traced method. The BPD might therefore be a good alternative to head measurements in estimating fetal weight.

Mode of delivery and its influence on women's satisfaction with childbirth.

OBJECTIVE: Many factors affect women's satisfaction with the experience of childbirth. Some of these are known, but most have not been fully evaluated. The influence of the mode of delivery is unclear. This study investigated the extent to which satisfaction with childbirth depends on the mode of delivery, and evaluated factors determining postpartum satisfaction. STUDY DESIGN: Women with singleton pregnancies at term were included prospectively. After childbirth, all women meeting the inclusion criteria received a standardised questionnaire - the German version of Salmon's Item List (SIL-Ger) - for completion before discharge to evaluate the birth experience. The chi-squared test, Fisher's exact test, and Kruskal-Wallis test were used for statistical analysis. Univariate and multivariate linear regression analyses were used to assess associations between demographic and pregnancy-associated variables and variables influencing the perception of childbirth in the total SIL-Ger score. Univariate and multivariate binary logistic regression models were used to evaluate effects of demographic and clinical parameters on SIL-Ger scores of <70 versus SIL-Ger scores of ≥ 70. All covariates with a P value ≤ 0.10 in the univariate analysis were included in multivariate logistic regression models. All tests were two-sided, and P values<0.05 were considered statistically significant. RESULTS: The analysis included 335 questionnaires. No differences were observed between different modes of delivery (normal 84.5 ± 14.6, primary caesarean 87.0 ± 13.5, secondary caesarean 83.2 ± 13.8, emergency caesarean 79.3 ± 7.3, operative vaginal delivery 83.9 ± 13.6; P=0.503). Multivariate analysis identified two independent factors associated with higher SIL-Ger scores: good/very good satisfaction with childbirth (P<0.001) and good/very good involvement in decision-making afterwards (P=0.005). Severe pain perception during childbirth was associated with lower SIL-Ger scores (P=0.003). Absence of a person of trust during childbirth was linked with scores<70 (P=0.005), indicating a negative experience. Good/very good satisfaction with childbirth (P<0.001) reduced the probability of a score<70. CONCLUSION: Mode of delivery does not directly influence women's satisfaction with childbirth. Involvement in decision-making, support during labour and effective analgesia appear to be the most important factors that improve women's birth experience.