3Van Kets H,Vrijens M, Van Trappen Y,et al. The frameless GyneFix intrauterine implant: a major improvement in efficacy, expulsion and tolerance[J]. Adv Contracept, 1995, 11 (2) : 131-142.
4Van Kets H, Wildemeersch D, Van der Pas H, et al. IUD expulsion solved with implant technology[J]. Contraception, 1995, 51(2) :87-92.
5Wildemeersch D, Van Kets H, Vrijens M,et al. Intrauterine contraception in adolescent women. The GyneFix intrauterine implant[J]. Ann N Y Acad Sci, 1997, 816:740-450.
6Lois A Salamonsen, GaborT Kovacs, Jock K. Current concepts of the mechanisms of menstruation[J]. Reprodalctive Medical J,2001,10( 1 ) :59 - 60
