Intrauterine Device (IUD) are one of the most used contraceptive methods. Unlike oral contraceptives, IUDs last for months and years. IUD is more than 99% effective in preventing unwanted pregnancies.
This video explains about menstruation, procedure of menses, ovulation, fertilization, effect of hormones and more. Video has types of IUDs, where it is placed (uterus) and methods by which it acts.