cd3477ff__Center___Let_s_Talk_About_Sex__Additional_Info
[Method] Oral contraceptives -- progestin-only "mini pill" [How it Works] Must be taken on daily schedule, regardless of frequency of intercourse. [Effectiveness] 95% [Availability] Prescribed by a doctor. [Protection against STD/HIV] none [Risks] Irregular bleeding, weight gain, breast tenderness, slightly increased chance of ectopic pregnancy. [Additional Info] 
This type of pill creates a layer of mucus around the cervix, providing a barrier.
Wellness Center - Let's Talk About Sex
Additional Info