Morphological aspects of placental haematomes of water buffalo placenta (Bubalus bubalis bubalis -- Linnaeus, 1758)

  • Flávia Thomaz Verechia Pereira Centro Universitário das Faculdades Metropolitanas Unidas, São Paulo, SP
  • Maria Angélica Miglino Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Cirurgia, São Paulo, SP
  • Estela Bevilacqua Universidade de São Paulo, Instituto de Ciências Biológicas, Departamento de Histologia e Embriologia, São Paulo, SP
  • Ana Flávia de Carvalho Fundação de Ensino Octávio Bastos, São João da Boa Vista, SP
Keywords: Placenta, Epitheliochorial, Buffalo, Haematomes

Abstract

The placental haematomes execute unknown functions in some species. In ewe this structures occur in an arcade zone of the placenton (tips of the maternal septa), region where occurs the trophoblastic erythrophagocytosis. The real function of the haematome is unknown in bufaline specie, which is very important in our study. There is great possibility of maternal-fetal transfer of iron across of these structures, that occur by extravasated maternal blood in determinate regions of the villi (maternal-fetal junction). Water buffalo placentae were used within 4-5, 7-8 and 9-10 months of pregnancy, immediately after sacrifice and fixed by perfusion the uterine vessels with paraformoldehyde 4% in 0,1M phosphate buffer; after perfusion, the placentons were fixed for light microscopy by immersion, too. After 24 hours, the pieces were cut and processed for embed in paraplast and historesin and staining by HE, Toluidine blue, Perls and PAS reactions, Gomori's and Mallory's tricrome. The haematomes were present in determinate regions of the placenton, which had haemorragic areas within the uterine and trophoblastic epithelium, in placentae of 7-8, 9-10 months of pregnancy. Maternal red cells were found into the trophoblastic cells, clearing the erythrophagocytosis.

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Published
2001-01-01
How to Cite
Pereira, F., Miglino, M., Bevilacqua, E., & Carvalho, A. (2001). Morphological aspects of placental haematomes of water buffalo placenta (Bubalus bubalis bubalis -- Linnaeus, 1758). Brazilian Journal of Veterinary Research and Animal Science, 38(4), 151-154. https://doi.org/10.1590/S1413-95962001000400001
Section
BASIC SCIENCES