x

Protective methods for red days

Use protection on red days to effectively prevent a pregnancy, or abstain from vaginal penetration. The risk of getting pregnant is significantly higher on these days as you are very likely to be fertile. What type of protection you choose to use on red days, is of course up to you. But the relative effectiveness will depend on that method’s Pearl Index.

Below we list different protective methods that you can combine with Natural Cycles. The efficacy is based on the specific method's Pearl Index, the lower the value, the better.

Method failure rate is the number of pregnancies when the method has been used according to instruction (also known as perfect use). Typical use is the rate most people achieve, as "perfect use"/method failure can be hard to achieve for many of the methods - such as withdrawal.

We recommend the use of the male condom or to abstain from vaginal intercourse during red days, as these two are the safest methods. Remember to put on the condom before the intercourse starts, to effectively prevent a pregnancy (along with preventing STI's).


Achieving correct use of withdrawal is very difficult, as sperm can often be laying in the vas deference and join the pre-ejaculation fluids during sex, causing a pregnancy despite the main ejaculation not entering the woman. Therefore, we do not recommend using withdrawal on red days.

 

Number of pregnancies per 100 women in one year.

Protective method

Method failure

Typical use

Male Condom

2

18

Abstention

0

0

Female condom

5

21

Withdrawal*

4

22

Cervical cap**

9

29

Diaphragm***

6

12

Spermicides

18

28

No method at all

85

85


Logged as unprotected intercourse in the app. Note that we do not recommend using withdrawal.
** Must be combined with spermicides. There has not yet been sufficient research performed on the cervical cap to give accurate numbers.
*** Must be combined with spermicides.