Some arthritis, such as rheumatoid arthritis and lupus, affects multiple organs and causes a wide range of symptoms. Oral contraceptive pills are split into two categories combined pills, that happen to be typically referred to as "the pill" and the mini pill. This division is completed judging by female hormones within the pills. Combination pills or pill contains two artificial female hormones that allow them to protect women against pregnancy in three ways. The mini pill, that is mistakenly think that the light source dose combined pill, is really a single artificial female hormone and works completely independently to prevent pregnancy. Smaller pills usually prevent sperm from entering the uterus and also affect the lining from the uterus in order to avoid pregnancy. For instance anal sex without using any preventive measures and then proceeding to continue with normal sexual intercourse can lead to the entry of bacteria inside the urinary tract through the vaginal canal.