Using two kinds of contraception together will make you 1,000's of
times safer than using 1 alone.
There are four main categories of contraceptives:
1.Condoms
2.Oral and Hormonal contraceptives such as the pill
3.The Pull-Out method
4.The Diaphragm or Cervical Cap.
Thus, you basically have six possible combinations to choose from:
Condoms and Birth Control
Condoms and Pull-Out
Birth Control and Pull-Out
Diaphragm and Condoms or Birth Control or Pull-Out
Risk of accidental pregnancy (Assuming perfect use of the
contraceptive)
Per Year (assuming 100 sex acts) Per Act
No protection 8 in 10 (1 in 1.25) 1 in 125
Condoms 1 in 50 1 in 5,000
Birth Control 1 in 200 1 in 20,000
Condoms & Birth Control 1 in 1,000,000 1 in 100,000,000