About 121 cases that women in southwestern university of finance and economics (SWUFE) use IUD have beenobserved by means of B-ultrasonograghy regularly for 10 years.

• 采用B超对某大学121例放置宫内节育器的妇女进行10年定期随访观察，发现：（1）宫内孕5例，宫外孕1例；