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This page/column contains information which may be of interest to consumers. The information is based on articles which appear in Australian Prescriber. As Australian Prescriber is written for health professionals, you should discuss any issues raised by this page/column with your doctor or pharmacist. They will be able to give a more detailed answer to your questions by reading the main article.
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Australian Prescriber Vol. 22 No. 1 1999
Progestogen-only methods of contraception
Progestogens are hormones. They are important in controlling the menstrual cycle. Some progestogens can be used to reduce the chance of getting pregnant. They are useful for women who are breast feeding or who cannot take other contraceptive pills.
The mini-pill contains a lower dose of progestogen than other contraceptive pills, but has a higher failure rate (3-10%). It must be taken at the same time each day to work properly.
Progestogens can also be given by injection. An injection every 12 weeks is very effective. The failure rate is only 0.5%.
The main problem with progestogen contraception is irregular periods. The injections may cause more irregular bleeding to begin with, but after several courses, the periods usually stop completely. Although these methods can make the woman put on weight, this is usually less than 2 kg.
