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No, the calendar method is a NATURAL method.
The calendar method is the least dependable method of contraception (aside from keeping your fingers crossed).
Unwanted pregnancy if not used correctly and possibly STDs.
Pregnancy and STDs. Wear a condom.
It can be used to prevent pregnancy when no other method is available. There are no medical or hormonal side effects. No prescription is necessary. It is free.
There are no side effects, but patients should be cautious when using the sunning exercise, which may cause solar retinitis, or inflammation of the retina, causing permanent damage.
placebo: a method to investigate of drugs.
The primary difference is in how they count years. They base their years on the reign of an emperor rather than the method of defining them by the Christian calendar.
New Style.
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