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Prostaglandin synthesis and metabolism in the human uterus and midtrimester fetal tissues.

Prostaglandin (PG) synthesis and metabolism was studied in human fetal kidney, lung, small intestine, heart, brain and liver (gestational ages: 10, 12, 14, 18 and 23 weeks) and pregnant uterus (4-40 weeks of pregnancy). PG synthesis was increased in the myometrium during pregnancy while the capacity of metabolism did not change. PG synthesis increased in lung and kidney (4-fold), brain (20-fold) and small intestine (2-fold) but not in heart or liver. Metabolic activity increased only in fetal kidney and lung.