Long-acting contraceptive pills are not available for one pill a year, but for one pill a month. However, because long-acting pills contain a large amount of estrogen and progestin, they can cause side effects such as ovarian dysfunction and menstrual disorders. If you need it, you should use the short-acting pill for three months before gradually stopping it. Oral long-acting contraceptives require six months of discontinuation before you can get pregnant, and are not recommended for women over 40. There is an increased risk of blood clots, and it is also not recommended for women with liver lesions, abnormal coagulation, or triglycerides. Women with ovarian cysts, uterine fibroids or breast enlargement should not take long-acting contraceptives either. Liver function should be monitored regularly during the course of the pill, and any abnormalities should be discontinued promptly.