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The major side effects of progestogen-only oral contraceptives are unpredictable bleeding patterns. These include erratic short or long cycles for your period or small amounts of bleeding between periods. Other unwanted effects may include nausea, vomiting, headache, breast discomfort, depression, skin disorders or weight gain. Although blood clots in the veins have been rarely associated with oral contraceptives, the progestogen-only contraceptives available carry less risk of blood clots and also heart disease than the combined (oestrogen and progestogen) oral contraceptives.
So what was my doctor on about? :confused: