<Table> <Tr> <Td> </Td> <Td> This article relies largely or entirely on a single source . Relevant discussion may be found on the talk page . Please help improve this article by introducing citations to additional sources . (September 2008) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article relies largely or entirely on a single source . Relevant discussion may be found on the talk page . Please help improve this article by introducing citations to additional sources . (September 2008) </Td> </Tr> <P> In humans, implantation is the stage of pregnancy at which the already fertilized egg adheres to the wall of the uterus . At this stage of prenatal development, the conceptus is called a blastocyst . It is by this adhesion that the fetus receives oxygen and nutrients from the mother to be able to grow . </P> <P> In humans, implantation of a fertilized ovum is most likely to occur around 9 days after ovulation, however this can range between 6 and 12 days . </P>

At the time of implantation the human embryo is called a