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    Quadrant HealthCom
  • Article
    Steven DH, Jeffcott LB, Mallon KA, Ricketts SW, Rossdale PD, Samuel CA.
    J Reprod Fertil Suppl. 1979(27):579-86.
    Post-partum placentae and uterine biopsy samples from mares after normal and abnormal foalings are described. After normal delivery there is little damage to fetal or maternal tissues. The villous epitheliochorial palcenta separates cleanly at the maternal-fetal interface and the afterbirth consists almost exclusively of fetal tissue. Uterine involution is well advanced by the 3rd and 4th days post partum and the changes are usually complete by the oestrus 7--10 days after parturition. Placental separation and involution of the uterus appear to proceed normally in malpresented foals and in otherwise viable foals with musculoskeletal defects. In aborted, stillborn or dysmature foals there are obvious signs of damage to both fetal and maternal tissues. It is generally accepted that the growth and development of the fetus is dependent upon a placenta of adequate functional capabilities. The observations suggest that the placenta is similarly dependent upon its association with a normal healthy fetus.
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