RELAXIN BIOACTIVITY AND IMMUNOACTIVITY IN HUMAN CORPORA LUTEA1

Abstract
Relaxin-like activity in extracts of corpora lutea (CL) from pregnant and non-pregnant women was determined by radioimmunoassay and by guinea pig pubic symphysis palpation assay. The biologically determined activity paralled the immunoactivity of extracts of CL of pregnancy. The relaxin content of CL of non-pregnant women was too low for detection by the bioassay.

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