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  • Title: Changes in endometrial vascular permeability during the periimplantation period in the ferret (Mustela putorius).
    Author: Mead RA, Bremner S, Murphy BD.
    Journal: J Reprod Fertil; 1988 Jan; 82(1):293-8. PubMed ID: 3339587.
    Abstract:
    A highly localized increase in permeability of uterine blood vessels in the immediate vicinity of implanting blastocysts was first detected on the morning of the 12th day of pregnancy (290 h post coitum). The amount of extravasated dye which accumulated at implantation sites continued to increase through the evening of Day 13 (321 h p.c.). Blastocyst expansion, as indicated by small uterine swellings, preceded a detectable change in vascular permeability by about 10 h, suggesting that the timing of increased permeability is closely associated with initial blastocyst attachment to the uterine epithelium. The results do not support the hypothesis that prostaglandins are required for increased uterine vascular permeability as two doses of indomethacin (4 and 8 mg/kg body wt) administered 5 times/day failed to decrease endometrial vascular permeability. However, the 8 mg dose did cause a significant reduction in size and number of uterine swellings and delayed or inhibited attachment of the trophoblast to the uterine epithelium in 2 of 5 ferrets. These findings suggest that prostaglandins play an important role in the process of implantation that is unrelated to decidual formation as the ferret is an adeciduate species.
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