Avoidance of used endometrial sites by blastocysts of the bank vole, Clethrionomys glareolus.
In bank voles blastocysts arising from mating immediately after parturition do not implant in used zones of the preceding pregnancy but in the regions between them. However, if mating is postponed until 12 or more days after parturition blastocysts do implant in used zones of the previous pregnancy. Implantations also occur at zones used two pregnancies previously. It seems likely that the absence of implantations at recently used zones of the uterus is determined by the uterus rather than blastocysts.
Department of Zoology, University of Oxford, UK.
J O
JO
Nerquaye-Tetteh
J R
JR
Clarke
D000818:Animals; D003411:Arvicolinae / Q000502:physiology*; D001755:Blastocyst / Q000502:physiology*; D003656:Decidua / Q000502:physiology; D010064:Embryo Implantation / Q000502:physiology*; D004717:Endometrium / Q000502:physiology*; D005260:Female; D049590:Postpartum Period / Q000502:physiology; D011247:Pregnancy