Perinatal outcome Archives - Revista Brasileira de Ginecologia e Obstetrícia
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2016;38(7):348-355
To identify the epidemiological risk factors for congenital anomalies (CAs) and the impact of these fetal malformations on the perinatal outcomes.
This prospective cohort study comprised 275 women whose fetuses had CAs. Maternal variables to establish potential risk factors for each group of CA and perinatal outcomes were evaluated. The primary outcome was CA. Secondary outcomes included: fetal growth restriction (FGR); fetal distress (FD); premature rupture of membranes (PROM); oligohydramnios or polyhydramnios; preterm delivery (PTD); stillbirth; cesarean section; low birth weight; Apgar score < 7 at the 1st and 5th minutes; need for assisted ventilation at birth; neonatal infection; need for surgical treatment; early neonatal death; and hospitalization time. Chi-square (x2) test and multilevel regression analysis were applied to compare the groups and determine the effects of maternal characteristics on the incidence of CAs.
The general prevalence of CAs was of 2.4%. Several maternal characteristics were associated to CAs, such as: age; skin color; level of education; parity; folic acid supplementation; tobacco use; and history of previous miscarriage. There were no significant differences among the CA groups in relation to FGR, FD, PROM, 1-minute Apgar score > 7, and need for assisted ventilation at birth. On the other hand, the prevalence of the other considered outcomes varied significantly among groups. Preterm delivery was significantly more frequent in gastrointestinal tract/abdominal wall defects. The stillbirth rate was increased in all CAs, mainly in isolated fetal hydrops (odds ratio [OR]: 27.13; 95% confidence interval [95%CI]: 2.90-253.47). Hospitalization time was higher for the urinary tract and congenital heart disease groups (p < 0.01). Neonatal death was significantly less frequent in the central nervous system anomalies group.
It was possible to identify several risk factors for CAs. Adverse perinatal outcomes were presented in all CA groups, and may differ according to the type of CA considered.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2016;38(7):348-355
To identify the epidemiological risk factors for congenital anomalies (CAs) and the impact of these fetal malformations on the perinatal outcomes.
This prospective cohort study comprised 275 women whose fetuses had CAs. Maternal variables to establish potential risk factors for each group of CA and perinatal outcomes were evaluated. The primary outcome was CA. Secondary outcomes included: fetal growth restriction (FGR); fetal distress (FD); premature rupture of membranes (PROM); oligohydramnios or polyhydramnios; preterm delivery (PTD); stillbirth; cesarean section; low birth weight; Apgar score < 7 at the 1st and 5th minutes; need for assisted ventilation at birth; neonatal infection; need for surgical treatment; early neonatal death; and hospitalization time. Chi-square (x2) test and multilevel regression analysis were applied to compare the groups and determine the effects of maternal characteristics on the incidence of CAs.
The general prevalence of CAs was of 2.4%. Several maternal characteristics were associated to CAs, such as: age; skin color; level of education; parity; folic acid supplementation; tobacco use; and history of previous miscarriage. There were no significant differences among the CA groups in relation to FGR, FD, PROM, 1-minute Apgar score > 7, and need for assisted ventilation at birth. On the other hand, the prevalence of the other considered outcomes varied significantly among groups. Preterm delivery was significantly more frequent in gastrointestinal tract/abdominal wall defects. The stillbirth rate was increased in all CAs, mainly in isolated fetal hydrops (odds ratio [OR]: 27.13; 95% confidence interval [95%CI]: 2.90-253.47). Hospitalization time was higher for the urinary tract and congenital heart disease groups (p < 0.01). Neonatal death was significantly less frequent in the central nervous system anomalies group.
It was possible to identify several risk factors for CAs. Adverse perinatal outcomes were presented in all CA groups, and may differ according to the type of CA considered.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 1998;20(7):389-394
DOI 10.1590/S0100-72031998000700004
Most authors agree on the negative impact of pregnancy in women with advanced maternal age on maternal and perinatal outcome. However, it is not usual to evaluate if some considered risk factors are only confounders because they are present in women over forty years. In order to identify the isolated effect of age on maternal and perinatal outcome of pregnancies in women over forty, 494 pregnancies from this age group were compared to 988 pregnancies among women aged 20 to 29 years, matched by parity. After controlling possible confounding variables through multivariate analysis, advanced maternal age maintained its association with a higher prevalence of hypertension, malpresentation, cesarean section, postpartum hemorrhage, low Apgar score, perinatal death, late fetal death and intrapartum fetal distress. These findings show the need for adequate obstetrical care with special attention to those factors in order to improve maternal and perinatal outcome of pregnancies in women with advanced age.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 1998;20(7):389-394
DOI 10.1590/S0100-72031998000700004
Most authors agree on the negative impact of pregnancy in women with advanced maternal age on maternal and perinatal outcome. However, it is not usual to evaluate if some considered risk factors are only confounders because they are present in women over forty years. In order to identify the isolated effect of age on maternal and perinatal outcome of pregnancies in women over forty, 494 pregnancies from this age group were compared to 988 pregnancies among women aged 20 to 29 years, matched by parity. After controlling possible confounding variables through multivariate analysis, advanced maternal age maintained its association with a higher prevalence of hypertension, malpresentation, cesarean section, postpartum hemorrhage, low Apgar score, perinatal death, late fetal death and intrapartum fetal distress. These findings show the need for adequate obstetrical care with special attention to those factors in order to improve maternal and perinatal outcome of pregnancies in women with advanced age.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2000;22(5):257-263
DOI 10.1590/S0100-72032000000500002
Purpose: to evaluate the evolution of gestation, metabolic control and perinatal outcome of pregestational diabetic patients and to perform a comparative study of the results of patients with insulin-dependent diabetes (type I) and non-insulin-dependent diabetes (type II). Methods: retrospective analysis of 57 pregestational diabetic woman charts who began a prenatal follow-up in the Service of Maternofetal Medicine of the Maternidade-Escola Assis Chateaubriand of the Universidade Federal do Ceará, in the period from January 1995 to December 1998. The 57 pregnant women included in the study were divided into groups: the first, composed of 28 patients with insulin-dependent diabetes (type I), and the second with 29 pregnant women with non-insulin-dependent diabetes (type II), controlled with diet or with oral hypoglycemics before pregnancy. Results: there was no statistically significant difference between the two groups in relation to the need of hospitalization for glycemia control (39.2% x 27.5%) and maternal complications, such as: chronic arterial hypertension (14.2% x 27.5%), pregnancy-induced hypertension (14.2% x 17.2%), premature rupture of membranes (3.5% x 10.3%), urinary tract infection (10.7% x 6.8%), and preterm labor (3.5% x 6.8%). However, episodes of maternal hypoglycemia were more frequent among insulin-dependent patients (35.7% x 3.4%). The perinatal results were similar. We observed a great number of congenital anomalies and increased perinatal morbidity and mortality. Conclusion: there was no difference in the incidence of obstetric and clinical complications between insulin-dependent and non-insulin-dependent patients, except for maternal hypoglycemia.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2000;22(5):257-263
DOI 10.1590/S0100-72032000000500002
Purpose: to evaluate the evolution of gestation, metabolic control and perinatal outcome of pregestational diabetic patients and to perform a comparative study of the results of patients with insulin-dependent diabetes (type I) and non-insulin-dependent diabetes (type II). Methods: retrospective analysis of 57 pregestational diabetic woman charts who began a prenatal follow-up in the Service of Maternofetal Medicine of the Maternidade-Escola Assis Chateaubriand of the Universidade Federal do Ceará, in the period from January 1995 to December 1998. The 57 pregnant women included in the study were divided into groups: the first, composed of 28 patients with insulin-dependent diabetes (type I), and the second with 29 pregnant women with non-insulin-dependent diabetes (type II), controlled with diet or with oral hypoglycemics before pregnancy. Results: there was no statistically significant difference between the two groups in relation to the need of hospitalization for glycemia control (39.2% x 27.5%) and maternal complications, such as: chronic arterial hypertension (14.2% x 27.5%), pregnancy-induced hypertension (14.2% x 17.2%), premature rupture of membranes (3.5% x 10.3%), urinary tract infection (10.7% x 6.8%), and preterm labor (3.5% x 6.8%). However, episodes of maternal hypoglycemia were more frequent among insulin-dependent patients (35.7% x 3.4%). The perinatal results were similar. We observed a great number of congenital anomalies and increased perinatal morbidity and mortality. Conclusion: there was no difference in the incidence of obstetric and clinical complications between insulin-dependent and non-insulin-dependent patients, except for maternal hypoglycemia.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(10):725-730
DOI 10.1590/S0100-72032003001000005
PURPOSE: to evaluate the perinatal outcome of fetuses with congenital anomalies of the urinary tract. METHODS: we reviewed the perinatal outcome of 35 fetuses with congenital anomalies of the urinary tract. The following characteristics related to the uropathy were analyzed: type (hydronephrosis, dysplasia and renal agenesis), side of lesion (bilateral or unilateral), and level of the obstruction (high or low, in hydronephrosis). The perinatal outcome was evaluated according to these characteristics. The data were analyzed by the c² test and by the exact Fisher test. The level of significance was 0.05. RESULTS: the incidence of hydronephrosis was 68.6%. Half of the fetuses had unilateral hydronephrosis. Renal dysplasia occurred in 17.1% of the cases; 83.3% of these were bilateral and 16.7%, unilateral. The incidence of renal agenesis was 14.3%, all bilateral. The fetuses with dysplasia/agenesis had a 91% incidence of oligohydramnios, preterm birth, low birth weight, and death. In the group with bilateral disease the presence of oligohydramnios, preterm birth, low birth weight, death, urinary tract infections, and the need of hospitalization for a period greater than 7 days was significant when compared to the group with unilateral disease. The need of hospitalization for a period greater than 7 days in patients with low obstruction was significantly higher when compared to the patients with high obstruction. CONCLUSIONS: hydronephrosis, bilateral disease, and lower obstruction were the most frequent uropathies. The dysplasia/agenesis group had a worse prognosis when compared with the hydronephrosis group. Bilateral disease had a worse prognosis when compared with the unilateral disease group. In the low obstruction group, the need for a period of hospitalization greater than seven days was higher than in the high obstruction group.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(10):725-730
DOI 10.1590/S0100-72032003001000005
PURPOSE: to evaluate the perinatal outcome of fetuses with congenital anomalies of the urinary tract. METHODS: we reviewed the perinatal outcome of 35 fetuses with congenital anomalies of the urinary tract. The following characteristics related to the uropathy were analyzed: type (hydronephrosis, dysplasia and renal agenesis), side of lesion (bilateral or unilateral), and level of the obstruction (high or low, in hydronephrosis). The perinatal outcome was evaluated according to these characteristics. The data were analyzed by the c² test and by the exact Fisher test. The level of significance was 0.05. RESULTS: the incidence of hydronephrosis was 68.6%. Half of the fetuses had unilateral hydronephrosis. Renal dysplasia occurred in 17.1% of the cases; 83.3% of these were bilateral and 16.7%, unilateral. The incidence of renal agenesis was 14.3%, all bilateral. The fetuses with dysplasia/agenesis had a 91% incidence of oligohydramnios, preterm birth, low birth weight, and death. In the group with bilateral disease the presence of oligohydramnios, preterm birth, low birth weight, death, urinary tract infections, and the need of hospitalization for a period greater than 7 days was significant when compared to the group with unilateral disease. The need of hospitalization for a period greater than 7 days in patients with low obstruction was significantly higher when compared to the patients with high obstruction. CONCLUSIONS: hydronephrosis, bilateral disease, and lower obstruction were the most frequent uropathies. The dysplasia/agenesis group had a worse prognosis when compared with the hydronephrosis group. Bilateral disease had a worse prognosis when compared with the unilateral disease group. In the low obstruction group, the need for a period of hospitalization greater than seven days was higher than in the high obstruction group.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(7):465-471
DOI 10.1590/S0100-72032003000700002
PURPOSE: to investigate the effect of antiretroviral drugs on carbohydrate metabolism in HIV-infected pregnant women and on fetal and neonatal prognosis. METHODS: a prospective study was conducted on 57 pregnant women. The women were divided into three groups: ZDV group, taking zidovudine (n=20), TT group, taking zidovudine + lamivudine + nelfinavir (n=25), and control group (n=12). Blood samples were obtained for the determination of the area under the curve (AUC) after a 75-g oral glucose test at four periods during pregnancy (1st=14-20 weeks, 2nd= 21-26 weeks, 3rd=27-32 weeks and 4th=33-38 weeks). Perinatal prognosis was based on prematurity rates, intrauterine growth restriction (IUGR), low birth weight, perinatal mortality, and vertical HIV-1 transmission. Data were analyzed statistically using the nonparametric c² test, Friedman test and Kruskal-Wallis test. RESULTS: the median values of the AUC were 11.685 mg/dL for the control group, 13.477 mg/dL for the ZDV Group, and 13.650 mg/dL for the TT group (p=0.049). The antiretroviral agents had no deleterious effects on prematurity, low birth weight, IUGR rates or on Apgar score. There was no case of vertical transmission of HIV-1. CONCLUSIONS: an association was detected between the use of triple therapy and the development of carbohydrate intolerance during pregnancy. This association was not shown with ZDV alone. The antiretroviral agents had no deleterious effects on perinatal prognosis.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(7):465-471
DOI 10.1590/S0100-72032003000700002
PURPOSE: to investigate the effect of antiretroviral drugs on carbohydrate metabolism in HIV-infected pregnant women and on fetal and neonatal prognosis. METHODS: a prospective study was conducted on 57 pregnant women. The women were divided into three groups: ZDV group, taking zidovudine (n=20), TT group, taking zidovudine + lamivudine + nelfinavir (n=25), and control group (n=12). Blood samples were obtained for the determination of the area under the curve (AUC) after a 75-g oral glucose test at four periods during pregnancy (1st=14-20 weeks, 2nd= 21-26 weeks, 3rd=27-32 weeks and 4th=33-38 weeks). Perinatal prognosis was based on prematurity rates, intrauterine growth restriction (IUGR), low birth weight, perinatal mortality, and vertical HIV-1 transmission. Data were analyzed statistically using the nonparametric c² test, Friedman test and Kruskal-Wallis test. RESULTS: the median values of the AUC were 11.685 mg/dL for the control group, 13.477 mg/dL for the ZDV Group, and 13.650 mg/dL for the TT group (p=0.049). The antiretroviral agents had no deleterious effects on prematurity, low birth weight, IUGR rates or on Apgar score. There was no case of vertical transmission of HIV-1. CONCLUSIONS: an association was detected between the use of triple therapy and the development of carbohydrate intolerance during pregnancy. This association was not shown with ZDV alone. The antiretroviral agents had no deleterious effects on perinatal prognosis.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2001;23(3):147-151
DOI 10.1590/S0100-72032001000300003
Purpose: to evaluate maternal hemodynamic and cardiac structural changes during the three trimesters of pregnancy and to relate them to the weight/gestational age of the newborn. Methods: twenty-two healthy pregnant women were submitted to echocardiography for the study of cardiac output, mean arterial pressure, left atrium diameter, and peripheral resistance during three periods of pregnancy, i.e., before the 12th week and at the 26thand 36th weeks of pregnancy. Seventeen pregnant women gave birth to infants with adequate weight for gestational age, four gave birth to small for gestational age newborns and one gave birth to a large for gestational age infant. Results: among mothers of low weight newborns, cardiac output and left atrium diameter remained constant, mean arterial pressure showed a tendency to increase and peripheral resistance was significantly increased (28%), during the gestation. Among the mothers of adequate weight newborns there was an increase in cardiac output of 19% in the second trimester and 8% in the third. The left atrial diameter increased approximately 9% during the gestation, with maintenance of mean arterial pressure and a tendency to a decrease in peripheral resistance. Conclusion: the present results support an association between hemodynamic adaptation and weight newborn.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2001;23(3):147-151
DOI 10.1590/S0100-72032001000300003
Purpose: to evaluate maternal hemodynamic and cardiac structural changes during the three trimesters of pregnancy and to relate them to the weight/gestational age of the newborn. Methods: twenty-two healthy pregnant women were submitted to echocardiography for the study of cardiac output, mean arterial pressure, left atrium diameter, and peripheral resistance during three periods of pregnancy, i.e., before the 12th week and at the 26thand 36th weeks of pregnancy. Seventeen pregnant women gave birth to infants with adequate weight for gestational age, four gave birth to small for gestational age newborns and one gave birth to a large for gestational age infant. Results: among mothers of low weight newborns, cardiac output and left atrium diameter remained constant, mean arterial pressure showed a tendency to increase and peripheral resistance was significantly increased (28%), during the gestation. Among the mothers of adequate weight newborns there was an increase in cardiac output of 19% in the second trimester and 8% in the third. The left atrial diameter increased approximately 9% during the gestation, with maintenance of mean arterial pressure and a tendency to a decrease in peripheral resistance. Conclusion: the present results support an association between hemodynamic adaptation and weight newborn.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2002;24(3):181-185
DOI 10.1590/S0100-72032002000300006
Purpose: to investigate the interactions between maternal age and adverse perinatal outcomes in the State of Rio Grande do Norte. Methods: we analyzed official records of 57,088 infants in the State of Rio Grande do Norte, from January 1997 to December 1997. Data were obtained from the Information System of the Health Ministry, Brazil. The sample was divided into three Groups I, II and III according to maternal age range: 10 to 19 years, 20 to 34, and 35 or more, respectively. The main outcome variables were: length of pregnancy, birth weight and mode of delivery. Statistical analysis was performed using chi² test. Results: preterm deliveries were 4.3% in the adolescent group vs 3.7% in Group II (p = 0.0028). The incidence of cesarean section was higher in Group II than in the other Groups (p<0.001). Low birth weight was significantly higher in Groups I (8.4%) and III (8.3%) when compared with Group II (6.5%) (p<0.0001). Conclusions: we found a higher incidence of lower birth weight and preterm delivery in the adolescent group. In women ³35 years old there was a high incidence of low birth weight and macrosomia. Results suggest that cesarean sections are more common in women aged 20-34 years than in adolescent and older mothers.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2002;24(3):181-185
DOI 10.1590/S0100-72032002000300006
Purpose: to investigate the interactions between maternal age and adverse perinatal outcomes in the State of Rio Grande do Norte. Methods: we analyzed official records of 57,088 infants in the State of Rio Grande do Norte, from January 1997 to December 1997. Data were obtained from the Information System of the Health Ministry, Brazil. The sample was divided into three Groups I, II and III according to maternal age range: 10 to 19 years, 20 to 34, and 35 or more, respectively. The main outcome variables were: length of pregnancy, birth weight and mode of delivery. Statistical analysis was performed using chi² test. Results: preterm deliveries were 4.3% in the adolescent group vs 3.7% in Group II (p = 0.0028). The incidence of cesarean section was higher in Group II than in the other Groups (p<0.001). Low birth weight was significantly higher in Groups I (8.4%) and III (8.3%) when compared with Group II (6.5%) (p<0.0001). Conclusions: we found a higher incidence of lower birth weight and preterm delivery in the adolescent group. In women ³35 years old there was a high incidence of low birth weight and macrosomia. Results suggest that cesarean sections are more common in women aged 20-34 years than in adolescent and older mothers.
