There is provided an apparatus (20) for extraction of at least one object from a cavity. The apparatus includes a sleeve (24) including an inflatable section (26) configured to surround the at least one object during inflation； a handle (29) configured to enable a user to hold the sleeve, the handle defining a holding edge (33) of an opening (31) at a first portion of the sleeve； and a handle-mount (32,52) mounted to a peripheral area (27) around the opening, the handle- mount being for attachment of a pump used for inflating the inflatable section. There is also provided a pressure limitation apparatus (100) configured to operate with a birth assistance device when attached via a conduit (28).
