RESUMEN
Fetal growth restriction (FGR) is a gynecological disorder of varying etiology. In the present study, an expression analysis of pregnancy-associated plasma protein A (PAPPA), pregnancy-associated plasma protein A2 (PAPPA2) and placenta-specific-1 (PLAC-1) was conducted in pregnancies with FGR and control pregnancies. Placental tissues were collected from pregnancies with FGR (n=16) and control pregnancies (n=16) and the expression of the genes of interest was examined by qPCR. The mean expression levels of PAPPA and PAPPA2 were significantly lower (P<0.001) in placental tissues from FGR pregnancies compared with tissues from healthy subjects, whereas the opposite pattern was observed for PLAC-1 (P<0.001). PAPPA and PLAC-1 expression in FGR and control subjects correlated with birth weight (P<0.001). The findings suggest a possible pathophysiological link between the development of FGR and the expression of PAPPA, PAPPA2 and PLAC-1.
Asunto(s)
Retardo del Crecimiento Fetal/metabolismo , Regulación de la Expresión Génica , Placenta/metabolismo , Proteínas Gestacionales/biosíntesis , Proteína Plasmática A Asociada al Embarazo/biosíntesis , Adulto , Femenino , Retardo del Crecimiento Fetal/patología , Humanos , Placenta/patología , EmbarazoRESUMEN
AIMS: To investigate the possible association between maternal diabetes mellitus and increased yolk sac diameter (YSD). METHODS: We searched the Early Pregnancy Unit database to identify singleton pregnancies with measurements of embryonic crown-rump length (CRL) and YSD at 6-10 weeks of gestation and subsequent delivery of phenotypically normal neonates. We compared the YSD in patients with pre-gestational and gestational diabetes with those who were unaffected by diabetes. RESULTS: A total of 3,686 cases were identified including 43 (1.2%) with type 1 diabetes, 31 (0.8%) with type 2 diabetes and 71 (1.9%) who subsequently developed gestational diabetes. The measured YSD in both the diabetic and non-diabetic groups were expressed as differences from the expected normal mean for CRL (Δ values). There were no significant differences in ΔYSD between the groups. The median (IQR) ΔYSD was 0.01 (-0.33 to 0.37) mm in the unaffected group, 0.01 (-0.35 to 0.51) mm in type 1 diabetes, -0.02 (-3.44 to 0.27) mm in type 2 diabetes and 0.01 (-0.28 to 0.35) mm in gestational diabetes. CONCLUSION: After exclusion of miscarriages and embryopathies, pre-gestational and gestational diabetes are not associated with altered YSD.
Asunto(s)
Diabetes Mellitus Tipo 1/patología , Diabetes Mellitus Tipo 2/patología , Diabetes Gestacional/patología , Primer Trimestre del Embarazo , Saco Vitelino/patología , Adulto , Estudios de Casos y Controles , Estudios Transversales , Largo Cráneo-Cadera , Diabetes Mellitus Tipo 1/diagnóstico por imagen , Diabetes Mellitus Tipo 2/diagnóstico por imagen , Diabetes Gestacional/diagnóstico por imagen , Femenino , Humanos , Embarazo , Estudios Retrospectivos , Ultrasonografía Prenatal , Saco Vitelino/diagnóstico por imagenRESUMEN
OBJECTIVE: The objective of the study was to predict the outcome of dichorionic (DC) twin pregnancies at 6-10 weeks' gestation from intertwin discordance in crown-rump length (CRL), heart rate (HR), and gestational sac diameter (GSD). STUDY DESIGN: Intertwin discordance in CRL, HR, and GSD, was compared in 3 groups of DC twin pregnancies with 2 live embryos at 6-10 weeks. In one group, there were 2 live births (n = 174), in another 1 live birth (n = 24), and in a third group there were no live births (n = 33). Regression analysis was used to determine the predictors of outcome. RESULTS: Significant contributors to the prediction of 1 intrauterine death were discordance in CRL and GSD. The only predictor of 2 deaths was discordance in CRL. Detection rates of screening for single or double death, at 10% false-positive rate, were 79.2% and 27.3%, respectively. CONCLUSION: In DC twins, intertwin discordance in CRL and GSD at 6-10 weeks can predict outcome.
Asunto(s)
Largo Cráneo-Cadera , Saco Gestacional/anatomía & histología , Saco Gestacional/ultraestructura , Frecuencia Cardíaca , Resultado del Embarazo , Embarazo Múltiple , Ultrasonografía Prenatal , Adulto , Femenino , Edad Gestacional , Humanos , Valor Predictivo de las Pruebas , EmbarazoRESUMEN
BACKGROUND: The aim of this retrospective study was to assess the value of maternal history and ultrasound scan findings at 6-10 weeks for predicting early miscarriage. METHODS: Embryonic crown-rump length (CRL), heart rate (HR), gestational sac diameter (GSD) and yolk sac diameter (YSD) were compared in two groups of women with singleton pregnancies attending an early pregnancy unit. In the first group the initial scan demonstrated a live embryo but in a subsequent visit the scan showed a dead embryo, complete or incomplete miscarriage. In the second group with a live embryo there was subsequent live birth of a normal neonate. RESULTS: There were 729 pregnancies with miscarriage and 4698 with normal outcome. Logistic regression analysis demonstrated that in the prediction of miscarriage the risk was higher in women of African racial origin [odds ratio (OR) 1.62], cigarette smokers (OR 1.91) and those with vaginal bleeding (OR 2.03) and increased with maternal age (OR 1.05) and YSD (OR 1.88) and was inversely related to CRL (OR 0.79), HR (OR 0.96) and GSD (OR 0.84). At false-positive rate of 30%, the detection rate of miscarriage in screening by vaginal bleeding was 45%, 53% by the addition of maternal history factors and 85.7% by the addition of ultrasound findings. CONCLUSIONS: In early pregnancy a prediction of miscarriage can be provided by a combination of maternal characteristics and ultrasound findings and the estimated risk can be used to rationalize follow-up. Our multivariate model requires prospective evaluation in a new sample population.
Asunto(s)
Aborto Espontáneo/diagnóstico por imagen , Primer Trimestre del Embarazo , Aborto Incompleto/diagnóstico por imagen , Adulto , Pueblo Asiatico , Población Negra , Largo Cráneo-Cadera , Femenino , Saco Gestacional/diagnóstico por imagen , Frecuencia Cardíaca Fetal , Humanos , Edad Materna , Embarazo , Análisis de Regresión , Estudios Retrospectivos , Ultrasonografía Prenatal , Población Blanca , Saco Vitelino/diagnóstico por imagenRESUMEN
OBJECTIVES: To construct normal ranges for embryonic crown-rump length (CRL), heart rate (HR), gestational sac diameter (GSD) and yolk sac diameter (YSD) at 6-10 weeks of gestation. METHODS: We examined 4,698 singleton pregnancies with ultrasound measurements of CRL, HR, GSD and YSD at 6-10 weeks and CRL at 11-13 weeks resulting in the live birth after 36 weeks of phenotypically normal neonates with birth weight above the 5th centile. Gestational age was derived from CRL at the 11- to 13-week scan using the formula of Robinson and Fleming. Regression analysis was used to establish normal ranges of CRL, fetal HR, GSD and YSD with gestation, and fetal HR, GSD and YSD with CRL. RESULTS: At 6-10 weeks there were significant quadratic associations between CRL, GSD, YSD and gestation and between HR, GSD, YSD and CRL, and a cubic association between HR and gestation. The estimated gestation from CRL was the same as that of Robinson and Fleming for a CRL of 10.2-36.5 mm, but the formula of Robinson and Fleming underestimated the gestation by 1 day for a CRL 7.4-10.2 mm and this increased to 9 days for a CRL of 1 mm. CONCLUSION: This study established normal ranges for early pregnancy biometry.