Advantages:
-It's natural
-There are no hormones
-It will not interrupt your natural cycle
-No side effects
-You can stop it at any time if you decide you want to get pregnant
-Inexpensive
Disadvantages: -Requires a lot of self control when used as a sole or main method of birth control
-No STD protection
-Doesn't work well with irregular cycles
-Can be easy to mess up
-There are no hormones
-It will not interrupt your natural cycle
-No side effects
-You can stop it at any time if you decide you want to get pregnant
-Inexpensive
Disadvantages: -Requires a lot of self control when used as a sole or main method of birth control
-No STD protection
-Doesn't work well with irregular cycles
-Can be easy to mess up