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  • Title: Prostaglandin production by horse embryos and the effect of co-culture of embryos with endometrium from pregnant mares.
    Author: Watson ED, Sertich PL.
    Journal: J Reprod Fertil; 1989 Sep; 87(1):331-6. PubMed ID: 2621704.
    Abstract:
    Embryos, endometrial biopsies, and uterine lavage fluid were collected from pregnant and non-pregnant mares 14 days after ovulation. Embryos were cultured for 20.5 h with and without endometrial tissue from pregnant mares, and endometrial tissue was cultured alone. Endometrial content of PGF tended to be higher (P = 0.06) in non-pregnant than in pregnant mares, but the amount of PGF released from tissue during culture was similar for pregnant and non-pregnant mares. Lavage fluid from non-pregnant mares also tended (P = 0.08) to contain higher concentrations of PGF. Coincubation of embryos with endometrium from pregnant mares significantly (P = 0.01) lowered concentrations of PGF in medium. Tissue concentrations and release of PGE-2 and 6-keto-PGF-1 alpha were similar in endometrial samples from pregnant and non-pregnant mares and prostaglandin production was unaffected by the presence of an embryo during incubation. Horse embryos released all three prostaglandins during a 20.5-h incubation.
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