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The rates of production of prostaglandin E (PGE), prostaglandin F (PGF) and 13,14-dihydro-15-oxo-prostaglandin F (PGFM) by intra-uterine tissues from pregnant monkeys in vitro have been determined using a method of tissue superfusion. The amnion, chorion, placenta, decidua basalis, decidua parietalis and myometrium were obtained at Caesarean section during late pregnancy. Production of PGE by all tissues was significantly lower at term than during late pregnancy, whereas production of PGF by the amnion, chorion, decidua parietalis and myometrium was significantly greater. All tissues produced significantly more PGE than PGF and also, excepting the decidua basalis and decidua parietalis, more PGFM than PGF. Close to parturition the amnion was quantitatively (per unit weight) the major source of prostaglandins. It is suggested that a specific change in the direction of prostaglandin synthesis by intra-uterine tissues occurs near parturition in the rhesus monkey.

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				J. L. Cook, M. C. Shallow, D. B. Zaragoza, K. I. Anderson, and D. M. Olson Mouse Placental Prostaglandins Are Associated with Uterine Activation and the Timing of Birth Biol Reprod, February 1, 2003; 68(2): 579 - 587. [Abstract] [Full Text] [PDF]