Assertion: forceps's curve | /r/CapableOf | allow grip
Facets:
value: on a fetal head
type: LOCATION
Source sentences:
text: In 1747, French obstetrician Andre Levret, published Observations sur les causes et accidents de plusieurs accouchements laborieux (Observations on the Causes and Accidents of Several difficult Deliveries), in which he described his modification of the instrument to follow the curvature of the maternal pelvis, this "pelvic curve" allowing a grip on a fetal head still high in the pelvic excavation, which could assist in more difficult cases.