Wiktionary
threatened abortion
n. (context medical English) A condition approximating an imminent abortion, where there is bleeding but the fetus remains attached to the uterine wall.
WordNet
threatened abortion
n. the appearance of symptoms that signal the impending loss of the products of conception [syn: imminent abortion]
Usage examples of "threatened abortion".
I would think with everything I've seen so far, what we've got is a classical threatened abortion.
York's case, 'threatened abortion' only means that her body itself is threatening the abortion.