subplacental

sub·pla·cen·tal

(sŭb'plă-sen'tăl),
Beneath the placenta; denoting the decidua basalis.
References in periodicals archive ?
In more advanced pregnancies, MR optimally demonstrates findings of placenta accreta spectrum, which may include thinning or absence of the subplacental myometrium, aberrant vessels, focal bulging of the uterine contour, and invasion of the urinary bladder or anterior abdominal wall.