Anteby E, Revel A, Ben-Chetrit A, Rosen B, Tadmor O, Yagel S
Department of Obstetrics and Gynecology, Hadassah University Hospital, Mount Scopus, Jerusalem, Israel.
Obstet Gynecol. 1993 Jan;81(1):112-4.
To investigate the possible role of position of the intrauterine device (IUD) in accidental pregnancies.
We examined the location of the IUD in 97 normal women 45-60 days post-insertion, and in 25 pregnant women with the device in situ.
A cervically located IUD was identified in seven of 97 women (7.2%) after insertion and in 13 of 25 pregnant women (52%) with the device in situ. The odds ratio for a woman with an intracervical IUD to be pregnant compared with a woman with an IUD in the uterus was 13.93 (95% confidence limits 4.13-48.96). Sonographic follow-up of the pregnant women revealed no change in IUD location during early gestation.
We suggest that cases of failed contraceptive action of the IUD may be secondary to a malpositioned device. A sonographic survey can identify displaced devices. Reinsertion of the IUD in such cases is recommended.
探讨宫内节育器（IUD）位置在意外妊娠中的可能作用。
我们检查了97名在放置IUD后45 - 60天的正常女性以及25名IUD在位的孕妇体内IUD的位置。
在97名放置IUD后的女性中有7名（7.2%）IUD位于宫颈，在25名IUD在位的孕妇中有13名（52%）IUD位于宫颈。宫颈内有IUD的女性与子宫内有IUD的女性相比，怀孕的优势比为13.93（95%置信区间4.13 - 48.96）。对孕妇的超声随访显示，妊娠早期IUD位置无变化。
我们认为IUD避孕失败可能是由于其位置不当所致。超声检查可识别移位的IUD。建议在这种情况下重新放置IUD。
