| 摘要 |
Intrauterine contraceptive device is an integral filamentary body with a flexible closed ovoid loop stem. At its leading end, the stem terminates in a pair of laterally extending flexible arms and, at its trailing end, terminates in a pair of laterally and axially rearwardly extending relatively inflexible arms, shorter in length than the arms at the leading end. Trailing arms serve to anchor the device relative to the cervix while the leading arms, as well as the stem, are free to conform to changes in position caused by muscular contractions of the uterus.
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