How is the ovulation day in a woman determined?
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Q. How is the ovulation day in a woman determined?

Answered by  
Dr. Ramchandra Lamba
and medically reviewed by   iCliniq medical review  team.


Professional Bio: Dr.Ramchandra Lamba is a Psychiatrist and a Sexologist with 16 years of clinical experience. He completed his MBBS from the University of Kerala in 2007. He then completed his MD in Psychiatry from Ra... 

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This is a premium question & answer published on Dec 24, 2017 and last reviewed on: Oct 14, 2022
Patient's Query

Hello doctor,

I have a question to ask about the ovulation period of a woman. How can we count the day of ovulation? Do we count from the first day of the period or from the last day of period?

Answered by  Dr. Ramchandra Lamba


Welcome to

The ovulation day is counted backward from the last day of the menstrual cycle.

For example, if a woman had a regular cycle of 30 days so she will ovulate 14 days prior to her last day of that cycle. Meaning, she ovulates on the 16th day of her cycle.

Another example is that if a lady has a regular cycle of 28 days then her ovulation will occur 14 days prior to her last day. Meaning, she will ovulate on the 14th day of her cycle.

It is so because the menses start exactly after 14 days of ovulation.

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