Abstract Parvovirus B19 is a single-stranded deoxyribonucleic acid (DNA) virus that has the potential for transplacental transmission in susceptible mothers. Congenital infection has been associated with severe fetal anemia, myocarditis,…

Abstract Twin reversed arterial perfusion (TRAP) sequence is a rare complication specific to monochorionic twin pregnancies in which a dysmorphic acardiac fetus receives circulatory support from a pump twin via…

Abstract The term dichorionic refers to a multiple gestation with two distinct placental disks (or two chorions); the term diamniotic describes a pregnancy with two distinct amniotic cavities. Either monozygotic…

Abstract Tuberous sclerosis is a disorder of cellular differentiation, proliferation, and migration in early development characterized by the formation of benign, harmartomatous lesions in virtually any organ system. Tuberous sclerosis…

Abstract Autosomal recessive pontocerebellar hypoplasia comprises a group of devastating neurodegenerative disorders that lead to severe motor and cognitive impairment. Life expectancy varies based on subtype and is unpredictable; few…

Abstract Monosomy for the distal portion of the short arm of chromosome 5 causes 5p deletion syndrome, which is also known by the currently less favored term “cri du chat”…

Abstract First clinically described in 1961 by Hirschhorn and subsequently in 1965 by Wolf, the 4p deletion syndrome, or Wolf-Hirschhorn Syndrome (WHS), is the first example of a classic human…

Abstract The term monochorionic refers to a multiple gestation with one placental disk (or chorion), and the term diamniotic describes the presence of two distinct amniotic cavities. By definition, monochorionic…

Abstract The term monochorionic refers to a multiple gestation with one placental disk (or chorion), whereas monoamniotic describes the presence of only one amniotic cavity. By definition, monoamniotic twin pregnancies…