Roberto Caldeyro-Barcia (26 September 1921 – 2 November 1996) was a Uruguayan doctor who pioneered the field of maternal–fetal medicine, or perinatology. His research with Dr. Hermógenes Alvarez created Montevideo units, a measure of uterine performance during labor. He was a founding editor of the ''Journal of Perinatal Medicine'', a widely published author, a lecturer, and the only Uruguayan to be nominated for a Nobel Prize.
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