Conjoined twins are an extremely rare congenital malformation without any known genetic predisposition. Omphalopagus twins are the second most common variety of conjoined twins and usually are joined at the umbilicus. We present omphalopagus conjoined twins demonstrated with true FISP (fast imaging with steady-state procession) and HASTE (half- Fourier acquisition single-shot turbo spin-echo) m...

Scanning electron microscopy transmission Kikuchi diffraction is able to identify twins in nanocrystalline material, regardless of their crystallographic orientation. In this study, it was employed to characterize deformation twins in Cu/10 wt % Zn processed by high-pressure torsion. It was found that in 83% of grains containing twins, at least one twin intersects with a triple junction. This s...

OBJECTIVES To determine whether twins in recent cohorts show similar academic performance in adolescence to singletons and to test the effect of birth weight on academic performance in twins and singletons. DESIGN Follow-up study. SETTING Denmark. PARTICIPANTS All twins (n=3411) and a 5% random sample of singletons (n=7796) born in Denmark during 1986-8. MAIN OUTCOME MEASURES Test score...

BACKGROUND Little is known about time trends in fecundity because few population-based data are available. In a survey among female twins born from 1953 to 1976, their time to pregnancy did not differ from singletons and can be considered to represent the fecundity of the general population. METHODS Information was collected by interview about waiting time to first pregnancy (TTP) and any per...

Epidemiological studies have consistently shown a positive association between size at birth (i.e. birth weight or birth length) and height in children, adolescents and adults. To examine whether this association is explained by genetic or nongenetic (intra-uterine) factors, we investigated birth weight, birth length and height in 60 dizygotic and 68 monozygotic adolescent twin pairs still livi...

Having noted a lack of oral corpora of Spanish twins’ voices, we have collected a database which consists of the following male speakers: 24 monozygotic twins, 10 dizygotic twins, 8 non-twin brothers, and 12 non-twin reference-population speakers. Twenty-two voice-related studies about twins have been reviewed in order to account for the average sample size of previous twin corpora, as well as ...

INTRODUCTION Conjoined twins occur in approximately 0.2:10,000 births; the obstetrician and sonographer only rarely examine them. In Western countries, discovery of conjoined twins is often made by the end of the first trimester; however, in the third world, conjoined twins are often discovered only at birth. OBJECTIVE To evaluate how ultrasound techniques, when possibly available, may improv...

Three experiments studied the perception of speech produced by female twins (5 MZ, 1 DZ) ranging in age from 20 to 67. The experiments were designed to discover whether listeners could detect differences between twins, and to explore listeners’ perceptual representations of talkers. Because identical twins have virtually identical vocal tracts and the twins in this study grew up together in the...

Twin investigation has played a major role in the history of human genetics. The present cross-sectional study was undertaken on 50 pairs of monozygotic and dizygotic (8 monozygotic and 42 dizygotic) aged 7-67 years in Amritsar district in Punjab. Results from twin studies indicate that all the means of height, weight, systolic blood pressure, diastolic blood pressure, waist circumference, hip ...