Background. With the introduction of three-dimensional (3D) ultrasound it has become possible to measure volumes. The relative increase in embryonic volume (EV) is much larger than that of the crown-rump length (CRL) over the same time period. We examined whether EV is a better parameter to determine growth restriction in fetuses with structural congenital abnormalities. Study Design, Subjects,...

The development of ultrasound technology allows us to see the structure and development of the fetus directly. Crown-Rump Length (CRL) and mean diameter of gestational sac (MSD) can be used to determine the age of the fetus. Both parameters are useful for measuring different aspects of the first trimester of pregnancy. This study proposes a method to obtain those parameter values automatically ...

BACKGROUND Our objective was to determine what effect maternal BMI has on fetal growth rate in the early first trimester. METHODS This was a prospective observational study of singleton pregnancies with certain dates, initially presenting for a transvaginal scan (TVS) before 12 weeks of gestation. Maternal characteristics (BMI, ethnicity, maternal age, obstetric history, abdominal pain and va...

background: in recent years, concerns have been raised about human reproductive disorders. caffeine consumption is increasing by the world’s population and there is a relationship between caffeine intake and adverse reproductive outcomes. the aim of this study was to evaluate the effects of caffeine on implantation sites, number of live births, birth weight, crown-rump length (crl) and abnormal...

Nuchal translucency (NT) thickness is utilized as a screening test in prenatal assessment of risk of aneuploidy in the first trimester. This test is performed between 11.0-13.9 weeks gestational age, corresponding to a crown-rump length (CRL) of 45-84mm. Alone, or in combination with maternal serum analytes of pregnancy-associated plasma protein A (PAPP-A) and beta human chorionic gonadotropin ...

Obtaining accurately staged rat embryos can be difficult because of the variety of breeding protocols employed and because precise staging cannot be confirmed until excision of the embryos from the dam. The detection of estrus, pairing of animals, and confirmation of pregnancies is generally left to commercial suppliers, as in-house breeding can be laborious and unpredictable. Here we describe ...

Fetal growth restriction in early pregnancy increases the risk of adverse pregnancy outcome, which has a significant social and psychological impact on women. There is limited information related to community-based study to evaluate early indicators related to miscarriage. The aim of this study is to examine the relationship between fetal growth restriction, measured by ultrasound crown-rump le...

OBJECTIVE To determine the potential value of measuring umbilical cord diameter (UCD) at 11-14 weeks of gestation in screening for chromosomal defects. METHODS The UCD was measured in 1323 fetuses immediately before chorionic villus sampling for karyotyping at 11-14 weeks of gestation. In the group of chromosomally normal fetuses, regression analysis was used to determine the association betw...