Effects of delayed transfer and treatment with oestrogen on the transport of microspheres by the rat oviduct

G. D. Moore, H. B. Croxatto

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

16 Citas (Scopus)


Starch or dextran blue microspheres were transferred microsurgically to the infundibulum of the oviduct on Days 1, 2, or 3 of pregnancy of control and oestradiol-treated rats. The animals were killed a few hours to several days after transfer to assess the number and distribution of ova and microspheres in the tract. After transfer on Day 1 of pregnancy, microspheres and eggs crossed the ampullary-isthmic junction (AIJ) 18 h after ovulation. After transfer on Day 2 of pregnancy, more than 50% of microspheres were retained in the ampulla, indicating that the AIJ changes again 34 h after ovulation. Treatment with oestradiol did not advance the passage of eggs or microspheres across the AIJ but caused accelerated transport through the isthmus as soon as the eggs or microspheres reached this segment. Dextran blue microspheres were seen to move back and forth in the isthmus of control anaesthetized rats at a frequency of 5-6 times/min. Between 7 and 20 h after treatment with oestradiol the frequency of these movements was significantly augmented, indicating that increased frequency of contractions of the smooth muscle of the isthmus precedes and accompanies accelerated transport of ova through this segment.

Idioma originalInglés
Páginas (desde-hasta)795-802
Número de páginas8
PublicaciónJournal of Reproduction and Fertility
EstadoPublicada - 1988

Áreas temáticas de ASJC Scopus

  • Fisiología
  • Embriología
  • Biología molecular
  • Ginecología y obstetricia
  • Biología del desarrollo


Profundice en los temas de investigación de 'Effects of delayed transfer and treatment with oestrogen on the transport of microspheres by the rat oviduct'. En conjunto forman una huella única.

Citar esto