superficial implantation

cen·tral im·plan·ta·tion

implantation in which the blastocyst remains in the uterine cavity, as in carnivores, rhesus monkeys, and rabbits.
References in periodicals archive ?
The spread pathways of SPPC remains not so clear, but is believed to be the hematological pathway and superficial implantation are the most important (2).

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