Progestin-only birth control pills are often referred to as mini-pills. Although mini-pills are not as popular as other birth control pills, the do have some advantages over other oral contraceptives.

Mini-pills are particularly convenient for women who cannot take estrogen. It's also an alternative to other birth control pills for breastfeeding women. Estrogen can inhibit the production of milk.

Many women think mini-pills are easier to take because, although they have to be taken at a certain time every 24 hours, there is only one pill to take through a woman's menstrual cycle. Combination birth control pills require a regimen where woman takes different pill in accordance with her menstruating.

There are other advantages to the mini-pill progestin-only birth control method. These include a decrease in painful cramps during menstruation, and a lessening in the amount of blood loss during menstruation. Women who are planning on breastfeeding their child may do so immediately after the baby is born. Mini-pills are also safer for women who suffer from migraine headaches or elevated blood pressure. Women who are at risk for heart disease should not take progestin-only birth control pills.

Drawbacks to mini-pills include spotting and abnormal bleeding patterns. And some say that mini-pills may be less effective than other birth control pills. And, as with any other birth control pill, progestin-only birth control pills offer no protection from sexually transmitted diseases.

Other side effects to mini-pills may include headaches, stomach pain, irregular or heaving bleeding and the absence of a monthly period.