Introduction: Low birth weight (LBW) is defined by the World Health Organization (WHO) as a birth weight strictly below 2500 g, whatever the term of pregnancy. It constitutes a major public health problem, both in dev...Introduction: Low birth weight (LBW) is defined by the World Health Organization (WHO) as a birth weight strictly below 2500 g, whatever the term of pregnancy. It constitutes a major public health problem, both in developed and developing countries, due to its magnitude and its strong association with infant morbidity and mortality. Main objective was to study the factors associated with the occurrence of small-for-gestational-age newborns in Douala. Methodology: We carried out a cross-sectional analytical study with prospective data collection using a technical pretested sheet in the maternity wards of the Douala General Hospital, the Laquintinie Hospital, and the District hospitals of Deido, Nylon and Bonassama over a period of 4 months (January to April 2020). We were interested in any newborn, born alive, vaginally or by cesarean section, of low weight, seen in the first 24 hours from a full-term single-fetal pregnancy whose mother had given her consent. Our sampling was consecutive and non-exhaustive. We excluded newborns whose term was unclear and those with congenital malformations or signs of embryo-foetopathy. Data collection was done using survey sheets. Statistical analyzes were carried out with CS Pro 7.3 and SPSS version 25.0 software. The Student, Chi-square and Fischer tests were used to compare the means of the variables, the percentages with a significance threshold P value Results: During the study period, 305 full-term newborns were included, divided into 172 boys and 133 girls. The percentage of small-for-gestational-age newborns was 9.8%;after multivariate analysis by logistic regression to eliminate confounding factors, we found maternal factors associated with small for gestational age newborns;maternal age less than 20 years, primiparity, gestational age (37 - 38), a delay in prenatal visits greater than 14 weeks, anemia in pregnancy, positive toxoplasmosis serology in pregnancy, a body mass index of Conclusion: Our study revealed the potential determinants of low birth weight at term in the Cameroonian urban context and specifically in Douala.展开更多
目的探讨极低出生体重儿(very low birth weight,VLBW)中适于胎龄儿(appropriate for gestational age,AGA)和小于胎龄儿(small for gestational age,SGA)身长增长对经外周中心静脉置管(peripherally inserted central catheter,PICC)...目的探讨极低出生体重儿(very low birth weight,VLBW)中适于胎龄儿(appropriate for gestational age,AGA)和小于胎龄儿(small for gestational age,SGA)身长增长对经外周中心静脉置管(peripherally inserted central catheter,PICC)尖端移位的影响,并横向比较影响程度,帮助医护人员更好地把握导管尖端位置监测的时机。方法回顾性分析2021年1月—2022年6月在医院NICU住院并使用PICC的VLBW,按出生体质量和胎龄关系分为AGA组45例和SGA组19例,记录首次置管当日身长(Ht_(1))以及PICC尖端位置、置管期间胸片检查当日身长(Ht_(n))以及PICC尖端位置,并计算相应的身长增长率。身长增长率与PICC尖端移位的相关性用Spearman秩相关分析。将AGA和SGA的身长增长率分别与PICC尖端移位进行简单线性回归分析,构建回归模型,用协方差分析比较两组回归直线。结果VLBW中AGA组97.8%患儿出现移位,SGA组所有的患儿都出现移位,占比最多的均为移位3个椎体。Spearman秩相关分析结果显示,两组患儿身长增长率与PICC尖端移位均具有相关性(AGA组rs=-0.719,P<0.001;SGA组rs=-0.769,P<0.001),随着VLBW身长增长,PICC尖端逐渐移位远离心脏。简单线性回归分析结果显示,AGA组回归模型(R^(2)=0.517,调整后R^(2)=0.513,F=129.487,P<0.001),SGA组回归模型(R^(2)=0.591,调整后R^(2)=0.585,F=95.385,P<0.001)。协方差分析结果显示,由于回归系数检验没有统计学意义,两条直线平行,说明身长增长率对两组患儿位移的影响一致。截距比较有统计学意义(F=9.265,P=0.003),说明两组患儿位移的起点不同(即增长率为零时的位移位置),说明位移与是否为AGA、SGA有关。结论随着VLBW中AGA和SGA身长增长,PICC尖端逐渐移位远离心脏,但相同的身长增长率,SGA引起的导管尖端移位幅度更大。建议AGA身长增长率12.4%、SGA身长增长率9.5%可作为监测导管尖端位置的重要时机,以免导管尖端进一步移位至非中心静脉,导致相关并发症发生。展开更多
The epidemiological associations between the prenatal perfluoroalkyl substances(PFASs)exposure and the reproductive outcomes remain controversial.A continuous evaluation is needed to combine the inconsistent results.I...The epidemiological associations between the prenatal perfluoroalkyl substances(PFASs)exposure and the reproductive outcomes remain controversial.A continuous evaluation is needed to combine the inconsistent results.In this study,we explored the associations between PFASs exposure and the low birth weight(LBW),preterm birth and small for gestational age(SGA).The quality of selected literature,quantitative estimates,publication bias and subgroup analysis were performed on the basis of 17 retrieved articles published before December 2020.The results showed a significant positive association between the perfluorooctane sulfonate(PFOS)exposure and the risk of LBW[Odds ratio(OR)=1.17;95%confidence interval(CI):1.01,1.36;heterogeneity:P=0.30,I2=17%].The positive association was also observed between the PFOS and the risk of preterm birth(OR=1.19;95%CI:1.01,1.39,P=0.007;I2=62%).There was a paucity of evidence regarding the negative effects of perfluorooctanoic acid(PFOA),perfluorohexanesulfonic acid(PFHxS)and perfluorononanoic acid(PFNA)on the pregnancy outcomes.The findings from the subgroup analysis(the sampling period,the birth gender and biologic specimens)did not substantially altered the results of the overall pooled estimate ORs.The increased prevalence of negative birth outcomes with gestational PFASs exposure warrants further explorations from biological process perspective.展开更多
Objective:Regarding frozen-thawed embryo transfer(FET),there is limited consensus on whether extending embryo culture from the cleavage stage to the blastocyst stage affects perinatal outcomes.This study aimed to comp...Objective:Regarding frozen-thawed embryo transfer(FET),there is limited consensus on whether extending embryo culture from the cleavage stage to the blastocyst stage affects perinatal outcomes.This study aimed to compare perinatal outcomes of singletons between blastocyst-stage embryo transfer(BT)and cleavage-stage embryo transfer(CT)in FET.Methods:A total of 9408 FET cycles that met the inclusion criteria were included in this retrospective cohort study between 2019 and 2022.Blastocyst-stage embryo transfers were performed in the BT group,and cleavage-stage embryo transfers were performed in the CT group.Multivariate logistic regression analyses were performed,as well as propensity score matching(PSM)to adjust for confounders.Results:After PSM,a higher risk of pre-term birth(PTB;odds ratio[OR]:1.23,95%confidence interval[CI]:1.00-1.50,P=0.048)and being large for gestational age(LGA;OR:1.16,95%CI:1.00-1.35,P=0.050)was observed in the BT group compared to that in the CT group.After stratified PSM,in the subgroup under 35 years of age,only an increased risk of LGA was observed in the BT group compared to the CT group.Perinatal outcomes in the double-embryo transfer subgroup were similar to those in the unstratified group.However,in the subgroup beyond 35 years of age and the single embryo transfer subgroup,perinatal outcomes were not statistically different between the BT and CT groups(P>0.05).Conclusions:In FET,prolonged embryo culture to the blastocyst stage increased the risk of PTB and LGA in single fetuses.However,stratified analysis based on age and the number of transferred embryos yielded different results,necessitating further mechanistic studies.展开更多
Being born with nonoptimal birth characteristics decreases the chance of becoming a father. Urogenital malformations as well as metabolic syndrome are more common in men born small for gestational age （SGA） and coul...Being born with nonoptimal birth characteristics decreases the chance of becoming a father. Urogenital malformations as well as metabolic syndrome are more common in men born small for gestational age （SGA） and could be contributing factors to the reduced fertility rate seen in these men. It could imply that men becoming fathers by assisted reproductive technology （ART） more often are born with low birth weight （LBW）, preterm, and/or SGA than men conceiving without treatment and also that men where intracytoplasmic sperm injection （ICSI） had to be performed more often are born with nonoptimal birth characteristics than men where conventional in vitro fertilization （IVF） successfully could be used. In this retrospective, case-control study using Swedish national registers, we compared the birth characteristics of 1206 men who have become fathers by ART with a control group consisting of age-matched men who became fathers without treatment. The differences in birth characteristics between men becoming fathers by IVF and ICSI were also assessed. For men becoming fathers by ART, OR of being born with LBW was 1.66 （95% CI = 1.17-2.36） compared with fathers who conceived without treatment. OR of being born prematurely was 1.32 （95% CI = 1.00-1.77）. Men becoming fathers via ICSI had a doubled increased likelihood of being born SGA compared with men who became fathers via IVF （OR = 2.12; 95% CI = 1.17-3.83）. In conclusion, we have found that men becoming fathers by ICSI treatments had more often been born SGA than men becoming fathers by conventional IVF.展开更多
文摘Introduction: Low birth weight (LBW) is defined by the World Health Organization (WHO) as a birth weight strictly below 2500 g, whatever the term of pregnancy. It constitutes a major public health problem, both in developed and developing countries, due to its magnitude and its strong association with infant morbidity and mortality. Main objective was to study the factors associated with the occurrence of small-for-gestational-age newborns in Douala. Methodology: We carried out a cross-sectional analytical study with prospective data collection using a technical pretested sheet in the maternity wards of the Douala General Hospital, the Laquintinie Hospital, and the District hospitals of Deido, Nylon and Bonassama over a period of 4 months (January to April 2020). We were interested in any newborn, born alive, vaginally or by cesarean section, of low weight, seen in the first 24 hours from a full-term single-fetal pregnancy whose mother had given her consent. Our sampling was consecutive and non-exhaustive. We excluded newborns whose term was unclear and those with congenital malformations or signs of embryo-foetopathy. Data collection was done using survey sheets. Statistical analyzes were carried out with CS Pro 7.3 and SPSS version 25.0 software. The Student, Chi-square and Fischer tests were used to compare the means of the variables, the percentages with a significance threshold P value Results: During the study period, 305 full-term newborns were included, divided into 172 boys and 133 girls. The percentage of small-for-gestational-age newborns was 9.8%;after multivariate analysis by logistic regression to eliminate confounding factors, we found maternal factors associated with small for gestational age newborns;maternal age less than 20 years, primiparity, gestational age (37 - 38), a delay in prenatal visits greater than 14 weeks, anemia in pregnancy, positive toxoplasmosis serology in pregnancy, a body mass index of Conclusion: Our study revealed the potential determinants of low birth weight at term in the Cameroonian urban context and specifically in Douala.
文摘目的探讨极低出生体重儿(very low birth weight,VLBW)中适于胎龄儿(appropriate for gestational age,AGA)和小于胎龄儿(small for gestational age,SGA)身长增长对经外周中心静脉置管(peripherally inserted central catheter,PICC)尖端移位的影响,并横向比较影响程度,帮助医护人员更好地把握导管尖端位置监测的时机。方法回顾性分析2021年1月—2022年6月在医院NICU住院并使用PICC的VLBW,按出生体质量和胎龄关系分为AGA组45例和SGA组19例,记录首次置管当日身长(Ht_(1))以及PICC尖端位置、置管期间胸片检查当日身长(Ht_(n))以及PICC尖端位置,并计算相应的身长增长率。身长增长率与PICC尖端移位的相关性用Spearman秩相关分析。将AGA和SGA的身长增长率分别与PICC尖端移位进行简单线性回归分析,构建回归模型,用协方差分析比较两组回归直线。结果VLBW中AGA组97.8%患儿出现移位,SGA组所有的患儿都出现移位,占比最多的均为移位3个椎体。Spearman秩相关分析结果显示,两组患儿身长增长率与PICC尖端移位均具有相关性(AGA组rs=-0.719,P<0.001;SGA组rs=-0.769,P<0.001),随着VLBW身长增长,PICC尖端逐渐移位远离心脏。简单线性回归分析结果显示,AGA组回归模型(R^(2)=0.517,调整后R^(2)=0.513,F=129.487,P<0.001),SGA组回归模型(R^(2)=0.591,调整后R^(2)=0.585,F=95.385,P<0.001)。协方差分析结果显示,由于回归系数检验没有统计学意义,两条直线平行,说明身长增长率对两组患儿位移的影响一致。截距比较有统计学意义(F=9.265,P=0.003),说明两组患儿位移的起点不同(即增长率为零时的位移位置),说明位移与是否为AGA、SGA有关。结论随着VLBW中AGA和SGA身长增长,PICC尖端逐渐移位远离心脏,但相同的身长增长率,SGA引起的导管尖端移位幅度更大。建议AGA身长增长率12.4%、SGA身长增长率9.5%可作为监测导管尖端位置的重要时机,以免导管尖端进一步移位至非中心静脉,导致相关并发症发生。
基金National Natural Science Foundation of China(No.22006010)Shanghai Sailing Program,China(No.19YF1400500)。
文摘The epidemiological associations between the prenatal perfluoroalkyl substances(PFASs)exposure and the reproductive outcomes remain controversial.A continuous evaluation is needed to combine the inconsistent results.In this study,we explored the associations between PFASs exposure and the low birth weight(LBW),preterm birth and small for gestational age(SGA).The quality of selected literature,quantitative estimates,publication bias and subgroup analysis were performed on the basis of 17 retrieved articles published before December 2020.The results showed a significant positive association between the perfluorooctane sulfonate(PFOS)exposure and the risk of LBW[Odds ratio(OR)=1.17;95%confidence interval(CI):1.01,1.36;heterogeneity:P=0.30,I2=17%].The positive association was also observed between the PFOS and the risk of preterm birth(OR=1.19;95%CI:1.01,1.39,P=0.007;I2=62%).There was a paucity of evidence regarding the negative effects of perfluorooctanoic acid(PFOA),perfluorohexanesulfonic acid(PFHxS)and perfluorononanoic acid(PFNA)on the pregnancy outcomes.The findings from the subgroup analysis(the sampling period,the birth gender and biologic specimens)did not substantially altered the results of the overall pooled estimate ORs.The increased prevalence of negative birth outcomes with gestational PFASs exposure warrants further explorations from biological process perspective.
文摘Objective:Regarding frozen-thawed embryo transfer(FET),there is limited consensus on whether extending embryo culture from the cleavage stage to the blastocyst stage affects perinatal outcomes.This study aimed to compare perinatal outcomes of singletons between blastocyst-stage embryo transfer(BT)and cleavage-stage embryo transfer(CT)in FET.Methods:A total of 9408 FET cycles that met the inclusion criteria were included in this retrospective cohort study between 2019 and 2022.Blastocyst-stage embryo transfers were performed in the BT group,and cleavage-stage embryo transfers were performed in the CT group.Multivariate logistic regression analyses were performed,as well as propensity score matching(PSM)to adjust for confounders.Results:After PSM,a higher risk of pre-term birth(PTB;odds ratio[OR]:1.23,95%confidence interval[CI]:1.00-1.50,P=0.048)and being large for gestational age(LGA;OR:1.16,95%CI:1.00-1.35,P=0.050)was observed in the BT group compared to that in the CT group.After stratified PSM,in the subgroup under 35 years of age,only an increased risk of LGA was observed in the BT group compared to the CT group.Perinatal outcomes in the double-embryo transfer subgroup were similar to those in the unstratified group.However,in the subgroup beyond 35 years of age and the single embryo transfer subgroup,perinatal outcomes were not statistically different between the BT and CT groups(P>0.05).Conclusions:In FET,prolonged embryo culture to the blastocyst stage increased the risk of PTB and LGA in single fetuses.However,stratified analysis based on age and the number of transferred embryos yielded different results,necessitating further mechanistic studies.
文摘Being born with nonoptimal birth characteristics decreases the chance of becoming a father. Urogenital malformations as well as metabolic syndrome are more common in men born small for gestational age （SGA） and could be contributing factors to the reduced fertility rate seen in these men. It could imply that men becoming fathers by assisted reproductive technology （ART） more often are born with low birth weight （LBW）, preterm, and/or SGA than men conceiving without treatment and also that men where intracytoplasmic sperm injection （ICSI） had to be performed more often are born with nonoptimal birth characteristics than men where conventional in vitro fertilization （IVF） successfully could be used. In this retrospective, case-control study using Swedish national registers, we compared the birth characteristics of 1206 men who have become fathers by ART with a control group consisting of age-matched men who became fathers without treatment. The differences in birth characteristics between men becoming fathers by IVF and ICSI were also assessed. For men becoming fathers by ART, OR of being born with LBW was 1.66 （95% CI = 1.17-2.36） compared with fathers who conceived without treatment. OR of being born prematurely was 1.32 （95% CI = 1.00-1.77）. Men becoming fathers via ICSI had a doubled increased likelihood of being born SGA compared with men who became fathers via IVF （OR = 2.12; 95% CI = 1.17-3.83）. In conclusion, we have found that men becoming fathers by ICSI treatments had more often been born SGA than men becoming fathers by conventional IVF.
