7 doctors weighed in:

How many days after your period is it safe to have sex with a little chance of getting pregnant?

7 doctors weighed in
Dr. Michael Opsahl
Fertility Medicine
5 doctors agree

In brief: Tricky Timing

Ovulation perhaps most reliably occurs 14 before the menses.
Ovulation can vary by several days between cycles. The egg can be fertilized for about 18 hours after ovulation but the sperm can live inside you for 2-3 days or more. If you really do not want to be pregnant then use a contraceptive in addition to timing. Timing failure rate is about 25%/year.

In brief: Tricky Timing

Ovulation perhaps most reliably occurs 14 before the menses.
Ovulation can vary by several days between cycles. The egg can be fertilized for about 18 hours after ovulation but the sperm can live inside you for 2-3 days or more. If you really do not want to be pregnant then use a contraceptive in addition to timing. Timing failure rate is about 25%/year.
Dr. Michael Opsahl
Dr. Michael Opsahl
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Dr. Terence Lee
Fertility Medicine

In brief: Never 100% safe

If you're irregular, then you can never safely avoid pregnancy.
It's possible, although unlikely, to have a period on one day and then to ovulate 40 days later. If you have a track record of having very consistently predictable cycles, then it is feasible to use timing as a form of birth control. It's not 100% effective, just as no method (other than complete abstinence) is 100% effective.

In brief: Never 100% safe

If you're irregular, then you can never safely avoid pregnancy.
It's possible, although unlikely, to have a period on one day and then to ovulate 40 days later. If you have a track record of having very consistently predictable cycles, then it is feasible to use timing as a form of birth control. It's not 100% effective, just as no method (other than complete abstinence) is 100% effective.
Dr. Terence Lee
Dr. Terence Lee
Thank
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