Hermógenes Álvarez

Clinical researcher, pioneer of the direct measurement of uterine contractile activity and chorionic villus sampling. Founder of “intrauterine pediatrics”

Abstract

This article revisits the scientific trajectory of Hermógenes Juan Álvarez Bengoa by stressing a crucial historiographical point: the priority of his own initiative in the earliest attempts to measure amniotic pressure and to record uterine contractility. Before the sustained collaboration with Roberto Caldeyro Barcia, it was Álvarez who conceived the use of amniotic puncture for research purposes and who promoted the first trials with the primitive measuring device designed together with Julio García Lagos, still preserved and dated October 31, 1946. From that line of work, later consolidated in the Department of Obstetric Physiology created in 1949, emerged the identification of the small, painless and previously imperceptible contractions now known as Álvarez contractions. The article also highlights his later work on the placenta and on what he himself called “intrauterine pediatrics,” including chorionic villus biopsy and phase-contrast microscopy, first applied to Rh fetal-maternal incompatibility and later projected toward prenatal genetic study.