Ovulation - meaning and definition
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Not yet reviewed by a clinician. This health entry was written from the public-health sources listed below and is general information only. It is not medical advice.
Definition
Ovulation is the release of a mature egg from an ovary, usually about 10 to 16 days before the next period. It is the time in the cycle when pregnancy is possible.
At a glance
- Ovulation is the release of a mature egg from an ovary.
- It usually happens about 10 to 16 days before the next period.
- An egg survives about a day, while sperm can survive up to around five days.
- The fertile window therefore covers several days before ovulation as well as the day itself.
- The combined pill works mainly by preventing ovulation.
In detail
An egg survives for about a day after it is released, but sperm can survive in the body for up to around five days. That means the fertile window covers several days before ovulation as well as the day itself.
Some people notice signs around ovulation, such as clearer and stretchier cervical mucus, a slight rise in resting body temperature afterwards, or brief one-sided pelvic twinges. Ovulation tests detect the hormone surge that precedes it. Hormonal contraception such as the combined pill works mainly by preventing ovulation.
In a sentence
- They used ovulation tests while trying to get pregnant.
- She sometimes feels a brief twinge on one side around ovulation.
Where the word comes from
Formed from Latin ovum, meaning egg. The word appeared in medical English in the 19th century.
Common questions
When does ovulation happen?
Usually about 10 to 16 days before the next period, so its timing depends on the length of the cycle. In irregular cycles it is harder to predict. Signs can include clearer, stretchier cervical mucus and brief one-sided pelvic twinges.
Can you get pregnant if you have sex before ovulation?
Yes. Sperm can survive in the body for up to around five days, so sex in the days before ovulation can lead to pregnancy. That is why the fertile window covers several days. A doctor or contraception service can help with planning or preventing pregnancy.