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  • Title: The estriol/creatinine ratio in a random urine sample as a screening test.
    Author: Hutchins CJ.
    Journal: Obstet Gynecol; 1978 Jul; 52(1):46-9. PubMed ID: 683629.
    Abstract:
    The estriol/creatinine ratio was determined in a first morning urine sample in 1808 pregnancies in the 32nd week of gestation. The ratio obtained correlated closely with birthweight and showed a linear increase with percentile birthweight group. There was a 25-fold increase in perinatal mortality in those pregnancies with a ratio below the tenth percentile; all pregnancies ending in stillbirths with birthweight below the tenth percentile gave such a ratio. The single estrogen/creatinine ratio allowed the early detection of a group of pregnancies at high risk of intrauterine growth retardation or major total abnormality without inconvenience for the patient.
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