·Intrauterine contraceptive devices- High amplitude echoes in the uterine cavity which remain at low gain setting with entrance and exit echoes giving a parallel appearance are seen in 65% of cases, ± distal acousting shadowing. Configuration of the ech reflects the type of IUCD. Women with an IUCD in situ who becocome pregnant are at increased risk of ectopic pregnancy.
·Calcifications- Commonly associated with myomas, which may appear intrauterine with the submucous variety.
·Retained products of conception- Bright echoes may be demonstrated within the uterus, oarticularly if osseus parts are retained.
·Radiation therapy implants- These may cause high intensity wchoes within the uterine cavity which may shadow. History of implant insertion may be obtained.
·Air within the uterine cavity- This usually follows dilatation and currentage or culdocentesis.
·Cerclage sutures- They may mimic IUCDs; an obvious history may be obtained.
·Intrauterine- This may be the result of previous osseous metaplasia pregnancy of inflammation (osteoid tissue)