Conjoined twins are rare variants of monozygotic twins, which result from an incomplete late division of the embryonic disk. Here we report the rarest case of conjoined twins - the male cephalothoracopagus janiceps disymmetros - born in prenatal week 30, from the archive of the Department of Teratology of the Institute of Experimental Medicine AS CR in Prague. The crown-rump length of each twin...

OBJECTIVE Quantitative analysis of the quality of nuchal translucency (NT) measurements. METHODS First-trimester combined screening for Down syndrome was performed to all pregnant women attended in our Department from October 2003 to November 2009. NT was measured according to the Fetal Medicine Foundation (FMF) criteria by 20 trained obstetricians. The performance of NT measurements was retr...

OBJECTIVES To evaluate in a national standardised setting whether the performance of ultrasound dating during the first rather than the second trimester of pregnancy had consequences regarding the definition of pre- and post-term birth rates. METHODS A cohort study of 8,551 singleton pregnancies with spontaneous delivery was performed from 2006 to 2012 at Copenhagen University Hospital, Holbæ...

OBJECTIVE To determine the number of ultrasound examinations necessary for training sonographers to examine accurately the fetal nasal bone at 11-14 weeks' gestation. METHODS Fifteen sonographers with experience in measuring nuchal translucency were asked to examine the nasal bone during the routine 11-14-week scan. The supervising doctor recorded if the sonographer succeeded in obtaining the...

We present data on prenatal growth, development, and skeletal ossification for the Angolan free-tailed bat (Mops condylurus), a species distributed throughout sub-Saharan Africa. Specimens were measured for crown–rump length (CRL), greatest length of the skull (GLS), forearm length, mass, and wing area. We cleared and differentially stained specimens for cartilage and bone to quantify pattern o...

BACKGROUND Human fetal kidney is quite different from the mature kidney, both macroscopically and hystologically. Lobulated surface of the human fetal kidney reflects its inner organisation. AIM To determine the fetal kidneys' volume according to the gestational age, to establish periods of their maximal and minimal growth and to compare these values for various gestational ages. METHODS Fo...

BACKGROUND To investigate normal reference values of nuchal translucency (NT) thickness in normal Taiwanese fetuses between 11 and 14 weeks of gestation. METHODS A prospective study of ultrasound measurements of fetal NT and crown-rump length (CRL) at 11-14 weeks of gestation was conducted in 724 consecutive Taiwanese fetuses between 1998 and 2001. The relationship between NT and 5-mm interva...

OBJECTIVE To describe a new ultrasound technique that may be useful for the diagnosis of micrognathia in the first trimester of pregnancy. METHODS The retronasal triangle (RNT) view is a technique that captures the coronal plane of the face in which the primary palate and the frontal processes of the maxilla are visualized simultaneously. Normal first-trimester fetuses display a characteristi...