didelphys

Didelphys is a term with two distinct uses in biology and medicine, and the two senses are otherwise unrelated.

In human medicine, uterus didelphys refers to a congenital Müllerian duct anomaly characterized by complete nonfusion of the paired Müllerian ducts. This results in two separate uterine cavities, each with its own cervix, and often a longitudinal vaginal septum with two vaginal canals. It is a rare condition that may be discovered incidentally or during evaluation for infertility or pregnancy. Diagnosis is usually via imaging, with ultrasound or magnetic resonance imaging (MRI) providing confirmation. Management is individualized and may range from expectant observation to obstetric planning in pregnancy. Fertility can be preserved, but there is an increased risk of pregnancy complications such as malpresentation, preterm delivery, and the potential need for cesarean delivery. Etiology is embryologic, stemming from failure of duct fusion during early development.

In zoology, Didelphis is a genus of opossums in the family Didelphidae, order Didelphimorphia. It includes several species native to the Americas, such as the Virginia opossum (Didelphis virginiana) in North America and the common opossum (Didelphis marsupialis) in other regions. Opossums are small to medium-sized marsupials that are typically nocturnal and omnivorous. Females possess a pouch in which underdeveloped young continue to grow after birth.

Etymology: Didelphys and Didelphis derive from Greek roots meaning “two” (di-) and “womb” (delphys), reflecting the dual aspects of the term’s usage.