(i) Name any two copper releasing IUDs.
(ii) Explain how do they act as effective contraceptives in human females.
(i) Cu-T, Cu-7 and Multiload 375.
(ii) IUDs function by either of the following mechanisms:
(a) Suppress sperm motility or fertilising capacity of sperms.
(b) Increase phagocytosis of sperms within the uterus.