The function of copper ions in copper releasing IUDs is to
1. | inhibit gametogenesis |
2. | make uterus unsuitable for implantation |
3. | inhibit ovulation |
4. | suppress sperm motility and fertilizing capacity of sperms |
Which of the following is hormone-releasing IUD?
(1) LNG-20
(2) Multiload-375
(3) Lippes loop
(4) Cu-7