Better Birth Control

For Health Conscious Women

Birth Control Efficacy Statistics

The following chart listing the efficacy of various birth control methods is produced by Contracept.org, and used by permission.

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FAILURE RATES
MECHANISM OF ACTION

STD

USER

method of
birth control
perfect use
actual use
prevents fertilization
prevents implantation
postpone sex
protection
continuation rates
No Method
85
85
         
Spermicides
18
29
++++
   
+
42
Male Condoms
2
15
++++
   
++
53
Female Condoms
5
21
++++
   
++
49
Diaphragm
6
16
++++
   
+
57
Cervical FemCap
w/o prior pregnancy
4
14
++++
   
+
57
Sponge
w/o prior pregnancy
9
16
++++
   
+
57
Sponge
w/ prior pregnancy
20
32
++++
   
+
46
Ovulation Method
3
22
+++
 
+
 
51
Sympto-Thermal
2.5
16
+++
 
+
 
51
Standard Days Method
5
12
+++
 
+
   
Calendar Method
5
13-20
+++
 
+
 
51
Lactation (LAM)
0.5
6
++++
       
Withdrawal
4
27
++++
   
+
43
Oral Contraceptives
0.3
8
+++
+
   
68
Ortho Evra Patch
0.3
8
+++
+
   
68
Nuva Ring
0.3
8
+++
+
   
68
Shot (Depo-Provera)
0.3
3
+++
+
   
56
Shot (Lunelle)
0.05
3
+++
+
   
59
IUD (ParaGard Copper)
0.8
0.6
++
++
   
80
IUD (Mirena)
0.1
0.1
++
++
   
80
Abstinence
0
0
++++
 
++++
++++
 

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