The ultrasonic estimation of fetal weight at delivery is of important prognostic significance in obstetrical practice. The convertional regression formulas used for estimating fetal weight have the disadvantage of less reliability. In this study, we used the back propagation neural network (BP) to estimate Fetal Weight. Some input variables were adopted in constructing the BP model: biparietal diameter (BPD), cerebellum transverse diameter (TCD), abdominal circumference (AC), liver length (LL), femur length (FL), fetal thigh soft tissue thickness (FSTT), and gestational age (GA). The fetal weights of 109 singleton fetuses were estimated. In the training group and validation group, coincidence rates were 89.77% and 76.19% respectively. The results show that the estimation based on neural network is more accurate than that by regression method. GA, its unit is not week but day in our formulas, is very valuable in combination with other ultrasonic parameters on estimation.
Anthropometry ; methods ; Birth Weight ; Female ; Fetal Weight ; Gestational Age ; Humans ; Infant, Newborn ; Neural Networks (Computer) ; Pregnancy ; Regression Analysis ; Term Birth

Objective To investigate sonographic characteristics of struma ovarii with conventional ultrasound and CEUS.Methods Ultrasound images of 65 patients with struma ovarii confirmed by pathology were retrospectively reviewed and analyzed,5 patients were examined with CEUS simultaneously.Results In all 65 patients,lesions in 14 (14/65,21.54 ％) were multocular,49 (49/65,75.34％) were cystic-solid component,2 (2/65,3.08％) were solid.Lesions in 39 (39/65,60.00％) contained dense latticed separation.The abundant blood flow was found in 18 cases (18/65,27.69％) with Doppler examination.Five cases were examined with CEUS,including multilocular lesions of 2 cases and cystic-solid lesions of 3 cases.Regular middle-degree intensity of cyst wall and septa were seen in all 5 cases.Among cystic-solid lesions of 3 cases,lesions of non-enhance pattern was seen in the solid areas of 1 case,irregular middle-high degree intensity pattern were seen in the solid areas of 2 cases,while non-enhance pattern could be seen in part of the solid areas of these 2 cases.All the cystic areas of these 5 cases showed non-enhance pattern.Conclusion The sonographic appearances of struma ovarii are usually multilocular or multilocular with solid component.Because of strum ovarii's special characteristic pathologic components,the imaging features of strum ovarii in conventional ultrasound and CEUS are atypical,thus preoperative diagnosis is quite difficult.

Objective:To evaluate the outcomes of monochromic diamniotic twins with different types of selec-tive intrauterine growth restriction(sIUGR).Methods:From January 2015 to December 2018,48 pregnant women with twins diagnosed with sIUGR before 26 weeks of pregnancy in the West China Second Hospital of Sichuan U-niversity were analyzed retrospectively.According to the changes of blood flow spectrum of umbilical artery(UA),it was divided into three types:typeⅠ(normal UA spectrum,27 cases),typeⅡ(constantly absent/reverse of UA end-diastolic blood flow,16 cases)and typeⅢ(intermittently absent/reverse of UA end-diastolic blood flow,5 ca-ses).The pregnancy outcome of each type of pregnant women and the clinical process of twins were analyzed.Results:①A statistically significant variance exists in the gestational age at delivery and birth weight of IUGR fe-tuses across the three groups(P＜0.05).Type Ⅱ sIUGR is correlated with lower birth weight and earlier gesta-tional age at delivery compared with typeⅠ(P＜0.05).②A statistically significant discrepancy is observed in the overall perinatal mortality rate among the groups,with type Ⅱ exhibiting a higher rate compared to type Ⅰ(P＜0.05).③There is a statistically significant difference in the overall neonatal survival rate in good condition among the three groups.Type Ⅰ has a higher overall neonatal survival rate in good condition compared to typesⅡ andⅢ(P＜0.05).Conclusions:The clinical process and outcomes varied among the three types of sIUGR,in which type Ⅱis the worst.Abnormal umbilical artery Doppleris associated with poor prognosis and therefore close moni-toring is warranted,to help determining the time of deliver,and improve perinatal survival ratey.

Objective:To evaluate the outcomes of monochromic diamniotic twins with different types of selec-tive intrauterine growth restriction(sIUGR).Methods:From January 2015 to December 2018,48 pregnant women with twins diagnosed with sIUGR before 26 weeks of pregnancy in the West China Second Hospital of Sichuan U-niversity were analyzed retrospectively.According to the changes of blood flow spectrum of umbilical artery(UA),it was divided into three types:typeⅠ(normal UA spectrum,27 cases),typeⅡ(constantly absent/reverse of UA end-diastolic blood flow,16 cases)and typeⅢ(intermittently absent/reverse of UA end-diastolic blood flow,5 ca-ses).The pregnancy outcome of each type of pregnant women and the clinical process of twins were analyzed.Results:①A statistically significant variance exists in the gestational age at delivery and birth weight of IUGR fe-tuses across the three groups(P＜0.05).Type Ⅱ sIUGR is correlated with lower birth weight and earlier gesta-tional age at delivery compared with typeⅠ(P＜0.05).②A statistically significant discrepancy is observed in the overall perinatal mortality rate among the groups,with type Ⅱ exhibiting a higher rate compared to type Ⅰ(P＜0.05).③There is a statistically significant difference in the overall neonatal survival rate in good condition among the three groups.Type Ⅰ has a higher overall neonatal survival rate in good condition compared to typesⅡ andⅢ(P＜0.05).Conclusions:The clinical process and outcomes varied among the three types of sIUGR,in which type Ⅱis the worst.Abnormal umbilical artery Doppleris associated with poor prognosis and therefore close moni-toring is warranted,to help determining the time of deliver,and improve perinatal survival ratey.

Objective:To evaluate the outcomes of monochromic diamniotic twins with different types of selec-tive intrauterine growth restriction(sIUGR).Methods:From January 2015 to December 2018,48 pregnant women with twins diagnosed with sIUGR before 26 weeks of pregnancy in the West China Second Hospital of Sichuan U-niversity were analyzed retrospectively.According to the changes of blood flow spectrum of umbilical artery(UA),it was divided into three types:typeⅠ(normal UA spectrum,27 cases),typeⅡ(constantly absent/reverse of UA end-diastolic blood flow,16 cases)and typeⅢ(intermittently absent/reverse of UA end-diastolic blood flow,5 ca-ses).The pregnancy outcome of each type of pregnant women and the clinical process of twins were analyzed.Results:①A statistically significant variance exists in the gestational age at delivery and birth weight of IUGR fe-tuses across the three groups(P＜0.05).Type Ⅱ sIUGR is correlated with lower birth weight and earlier gesta-tional age at delivery compared with typeⅠ(P＜0.05).②A statistically significant discrepancy is observed in the overall perinatal mortality rate among the groups,with type Ⅱ exhibiting a higher rate compared to type Ⅰ(P＜0.05).③There is a statistically significant difference in the overall neonatal survival rate in good condition among the three groups.Type Ⅰ has a higher overall neonatal survival rate in good condition compared to typesⅡ andⅢ(P＜0.05).Conclusions:The clinical process and outcomes varied among the three types of sIUGR,in which type Ⅱis the worst.Abnormal umbilical artery Doppleris associated with poor prognosis and therefore close moni-toring is warranted,to help determining the time of deliver,and improve perinatal survival ratey.

Objective:To evaluate the outcomes of monochromic diamniotic twins with different types of selec-tive intrauterine growth restriction(sIUGR).Methods:From January 2015 to December 2018,48 pregnant women with twins diagnosed with sIUGR before 26 weeks of pregnancy in the West China Second Hospital of Sichuan U-niversity were analyzed retrospectively.According to the changes of blood flow spectrum of umbilical artery(UA),it was divided into three types:typeⅠ(normal UA spectrum,27 cases),typeⅡ(constantly absent/reverse of UA end-diastolic blood flow,16 cases)and typeⅢ(intermittently absent/reverse of UA end-diastolic blood flow,5 ca-ses).The pregnancy outcome of each type of pregnant women and the clinical process of twins were analyzed.Results:①A statistically significant variance exists in the gestational age at delivery and birth weight of IUGR fe-tuses across the three groups(P＜0.05).Type Ⅱ sIUGR is correlated with lower birth weight and earlier gesta-tional age at delivery compared with typeⅠ(P＜0.05).②A statistically significant discrepancy is observed in the overall perinatal mortality rate among the groups,with type Ⅱ exhibiting a higher rate compared to type Ⅰ(P＜0.05).③There is a statistically significant difference in the overall neonatal survival rate in good condition among the three groups.Type Ⅰ has a higher overall neonatal survival rate in good condition compared to typesⅡ andⅢ(P＜0.05).Conclusions:The clinical process and outcomes varied among the three types of sIUGR,in which type Ⅱis the worst.Abnormal umbilical artery Doppleris associated with poor prognosis and therefore close moni-toring is warranted,to help determining the time of deliver,and improve perinatal survival ratey.

Objective:To evaluate the outcomes of monochromic diamniotic twins with different types of selec-tive intrauterine growth restriction(sIUGR).Methods:From January 2015 to December 2018,48 pregnant women with twins diagnosed with sIUGR before 26 weeks of pregnancy in the West China Second Hospital of Sichuan U-niversity were analyzed retrospectively.According to the changes of blood flow spectrum of umbilical artery(UA),it was divided into three types:typeⅠ(normal UA spectrum,27 cases),typeⅡ(constantly absent/reverse of UA end-diastolic blood flow,16 cases)and typeⅢ(intermittently absent/reverse of UA end-diastolic blood flow,5 ca-ses).The pregnancy outcome of each type of pregnant women and the clinical process of twins were analyzed.Results:①A statistically significant variance exists in the gestational age at delivery and birth weight of IUGR fe-tuses across the three groups(P＜0.05).Type Ⅱ sIUGR is correlated with lower birth weight and earlier gesta-tional age at delivery compared with typeⅠ(P＜0.05).②A statistically significant discrepancy is observed in the overall perinatal mortality rate among the groups,with type Ⅱ exhibiting a higher rate compared to type Ⅰ(P＜0.05).③There is a statistically significant difference in the overall neonatal survival rate in good condition among the three groups.Type Ⅰ has a higher overall neonatal survival rate in good condition compared to typesⅡ andⅢ(P＜0.05).Conclusions:The clinical process and outcomes varied among the three types of sIUGR,in which type Ⅱis the worst.Abnormal umbilical artery Doppleris associated with poor prognosis and therefore close moni-toring is warranted,to help determining the time of deliver,and improve perinatal survival ratey.

Objective:To evaluate the outcomes of monochromic diamniotic twins with different types of selec-tive intrauterine growth restriction(sIUGR).Methods:From January 2015 to December 2018,48 pregnant women with twins diagnosed with sIUGR before 26 weeks of pregnancy in the West China Second Hospital of Sichuan U-niversity were analyzed retrospectively.According to the changes of blood flow spectrum of umbilical artery(UA),it was divided into three types:typeⅠ(normal UA spectrum,27 cases),typeⅡ(constantly absent/reverse of UA end-diastolic blood flow,16 cases)and typeⅢ(intermittently absent/reverse of UA end-diastolic blood flow,5 ca-ses).The pregnancy outcome of each type of pregnant women and the clinical process of twins were analyzed.Results:①A statistically significant variance exists in the gestational age at delivery and birth weight of IUGR fe-tuses across the three groups(P＜0.05).Type Ⅱ sIUGR is correlated with lower birth weight and earlier gesta-tional age at delivery compared with typeⅠ(P＜0.05).②A statistically significant discrepancy is observed in the overall perinatal mortality rate among the groups,with type Ⅱ exhibiting a higher rate compared to type Ⅰ(P＜0.05).③There is a statistically significant difference in the overall neonatal survival rate in good condition among the three groups.Type Ⅰ has a higher overall neonatal survival rate in good condition compared to typesⅡ andⅢ(P＜0.05).Conclusions:The clinical process and outcomes varied among the three types of sIUGR,in which type Ⅱis the worst.Abnormal umbilical artery Doppleris associated with poor prognosis and therefore close moni-toring is warranted,to help determining the time of deliver,and improve perinatal survival ratey.

Objective:To evaluate the outcomes of monochromic diamniotic twins with different types of selec-tive intrauterine growth restriction(sIUGR).Methods:From January 2015 to December 2018,48 pregnant women with twins diagnosed with sIUGR before 26 weeks of pregnancy in the West China Second Hospital of Sichuan U-niversity were analyzed retrospectively.According to the changes of blood flow spectrum of umbilical artery(UA),it was divided into three types:typeⅠ(normal UA spectrum,27 cases),typeⅡ(constantly absent/reverse of UA end-diastolic blood flow,16 cases)and typeⅢ(intermittently absent/reverse of UA end-diastolic blood flow,5 ca-ses).The pregnancy outcome of each type of pregnant women and the clinical process of twins were analyzed.Results:①A statistically significant variance exists in the gestational age at delivery and birth weight of IUGR fe-tuses across the three groups(P＜0.05).Type Ⅱ sIUGR is correlated with lower birth weight and earlier gesta-tional age at delivery compared with typeⅠ(P＜0.05).②A statistically significant discrepancy is observed in the overall perinatal mortality rate among the groups,with type Ⅱ exhibiting a higher rate compared to type Ⅰ(P＜0.05).③There is a statistically significant difference in the overall neonatal survival rate in good condition among the three groups.Type Ⅰ has a higher overall neonatal survival rate in good condition compared to typesⅡ andⅢ(P＜0.05).Conclusions:The clinical process and outcomes varied among the three types of sIUGR,in which type Ⅱis the worst.Abnormal umbilical artery Doppleris associated with poor prognosis and therefore close moni-toring is warranted,to help determining the time of deliver,and improve perinatal survival ratey.

Objective:To evaluate the outcomes of monochromic diamniotic twins with different types of selec-tive intrauterine growth restriction(sIUGR).Methods:From January 2015 to December 2018,48 pregnant women with twins diagnosed with sIUGR before 26 weeks of pregnancy in the West China Second Hospital of Sichuan U-niversity were analyzed retrospectively.According to the changes of blood flow spectrum of umbilical artery(UA),it was divided into three types:typeⅠ(normal UA spectrum,27 cases),typeⅡ(constantly absent/reverse of UA end-diastolic blood flow,16 cases)and typeⅢ(intermittently absent/reverse of UA end-diastolic blood flow,5 ca-ses).The pregnancy outcome of each type of pregnant women and the clinical process of twins were analyzed.Results:①A statistically significant variance exists in the gestational age at delivery and birth weight of IUGR fe-tuses across the three groups(P＜0.05).Type Ⅱ sIUGR is correlated with lower birth weight and earlier gesta-tional age at delivery compared with typeⅠ(P＜0.05).②A statistically significant discrepancy is observed in the overall perinatal mortality rate among the groups,with type Ⅱ exhibiting a higher rate compared to type Ⅰ(P＜0.05).③There is a statistically significant difference in the overall neonatal survival rate in good condition among the three groups.Type Ⅰ has a higher overall neonatal survival rate in good condition compared to typesⅡ andⅢ(P＜0.05).Conclusions:The clinical process and outcomes varied among the three types of sIUGR,in which type Ⅱis the worst.Abnormal umbilical artery Doppleris associated with poor prognosis and therefore close moni-toring is warranted,to help determining the time of deliver,and improve perinatal survival ratey.