Fertility awareness is a way to try to prevent pregnancy by not having sex around
the time of
(the release of an egg during a woman's monthly cycle). Couples who want
to have a baby can also use this method to plan sex during the time the woman is most
likely to conceive. Fertility awareness is sometimes called natural family planning,
periodic abstinence, or the rhythm method.
How Does Fertility Awareness Work?
If a couple doesn't have sex around the time of ovulation, the girl is less likely
to get pregnant. The trick is knowing when ovulation happens. Couples use a calendar,
a thermometer to measure body temperature, the thickness of cervical mucus, or a kit
that tests for ovulation. The ovulation kits are more useful for couples who are trying
to get pregnant. The fertile period around ovulation lasts 6 to 8 days. During this
time, a couple using only fertility awareness for birth
control should not have sex.
How Well Does Fertility Awareness Work?
Fertility awareness is not a reliable way to prevent pregnancy for most people.
Over the course of a year, as many as 24 out of 100 typical couples who use fertility
awareness alone will have an accidental pregnancy.
It is often very hard to tell when a girl is ovulating. She can conceive for up
to 5 or 6 days before she ovulates and 1 or 2 days after. Because teens often have
irregular periods, it
makes predicting ovulation much harder. Even girls who usually have regular cycles
can have irregular timing of ovulation from things like stress or illness. Fertility
awareness requires a commitment to monitoring body changes, keeping daily records,
and not having sex during the fertile period.
Does Fertility Awareness Help Prevent STDs?
No. Fertility awareness does not protect against STDs.
Couples having sex must always use condoms
to protect against STDs, even when using another birth
When Should I Call the Doctor?
A girl who uses fertility awareness should call the doctor if she: