Intra Uterine Ball non hormonal Contraceptive. The IUB™ Ballerine^® is a long-term birth control method that requires no hormones and is effective for up to 5 years. The IUB™ Ballerine^® works along the same principle as other copper intrauterine devices to prevent pregnancy locally – within the uterus. The IUB™ Ballerine^® is one third the size of traditional T-shape intrauterine devices and can be easily inserted and removed for up to 5 years. The efficacy of the IUB™ Ballerine^® is over 99%¹ in pregnancy prevention, demonstrates a higher safety profile due to dramatically fewer ectopic pregnancies.