locked twins

locked twins

a form of malpresentation in which a breech twin and a vertex twin become locked at the chin during labor and attempted delivery.

locked twins

lock·ed twins

(lokt twinz)
A form of malpresentation in which a breech twin and a vertex twin become locked at the chin during labor and attempted delivery.
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References in periodicals archive ?
Manoeuvre for the simultaneous delivery of chin to chin locked twins.