Ovulation Calculator

(Ovulation Calendar / Ovulation Chart)

Understanding theOvulation Calendarhelps women in family planning practice by charting out the exact day of ovulation. This information is vital for both planning pregnancy and avoiding unwanted pregnancies. Ovulation occurs only on one day in the menstrual cycle of a woman, followed by menstruation after 2 weeks. However, the ovulation time from the start of the menstrual cycle can vary(1 Trusted Source
The timing of the "fertile window" in the menstrual cycle: day specific estimates from a prospective study.

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Ovulation calculator is most useful for women whose menstrual cycles are usually regular. Just enter the first day of your last menstrual period and the length of that cycle. Good Luck with your calculation!!

Know Your Most Fertile Days

First Day of Last Menstrual Period*
Average Length of Cycles *  Days
* Mandatory
Menstrural Cycle


Interesting Facts about Ovulation

Are you a bit mystified about your ovulation? If you want to know more about ovulation and fertility read our interesting must know facts?
  • Each girl baby is born with a few million immature eggs in each of the two ovaries.
  • Once the girls attain puberty, menstruation and ovulation begin.
  • Ovulation usually occurs about 14 days before the start of the next menstrual period(2 Trusted Source
    Ovulation and fertility

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  • During ovulation, generally only one egg is released.
  • Once the egg is released from the ovary, it survives for only 12-24 hours(3 Trusted Source
    Natural Family Planning

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  • The sperm from a partner should be available during this time to impregnate the egg.
  • While ovulation is necessary for pregnancy, it's important to remember that not all ovulation result in pregnancy and that other factors such as sperm quality and timing of intercourse also play a role in conception.
  • Once fertilized, the egg takes 6-12 days for its implantation in the uterus and for the pregnancy to start(4 Trusted Source
    Implantation and Establishment of Pregnancy in Human and Nonhuman Primates.

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  • During ovulation, the body temperature rises by a few points (but remains within the normal range)(5 Trusted Source
    Physiology, Ovulation And Basal Body Temperature.

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  • Besides temperature, ovulation can also be monitored through various medical tests, such as ultrasound and blood tests.
  • Sometimes some light blood spotting may occur during ovulation.
  • Women who have regular menstrual cycles typically ovulate once per cycle, but it's possible to ovulate multiple times in a cycle, particularly with the use of fertility drugs or in rare cases of"superfetation"(6 Trusted Source
    Women may ovulate two or three times a month

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  • Ovulation can be affected by stress, illness, weight changes, drugs and certain medical conditions leading to irregular or absent periods.
  • Certain factors, such as age, smoking, and exposure to environmental toxins can decrease a woman's egg quality and quantity, making it more difficult to conceive(7 Trusted Source
    Environmental Toxins and Infertility

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  • In some cases, medical interventions such as fertility drugs or assisted reproductive technologies may be necessary to help a woman ovulate and conceive(8 Trusted Source
    Assisted Reproductive Technology (ART) Technique

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  • In rare cases, some women may experience conditions such as polycystic ovary syndrome (PCOS) or premature ovarian failure (POF) that can affect ovulation and fertility(9 Trusted Source
    Ovarian failure and polycystic ovary syndrome

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  • Some women may experience pain or ache in the lower section of the abdomen and this is called mittelschmerz, which means, "middle pain" in German(10 Trusted Source

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  • Ovulation predictor kits and fertility tracking apps can help women identify their fertile window and increase their chances of conceiving(11 Trusted Source
    Increased Likelihood of Pregnancy Using an App-Connected Ovulation Test System: A Randomized Controlled Trial.

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  • 1. The timing of the "fertile window" in the menstrual cycle: day specific estimates from a prospective study.
  • 2. Ovulation and fertility
  • 3. Natural Family Planning
    ( )
  • 4. Implantation and Establishment of Pregnancy in Human and Nonhuman Primates.
    ( )
  • 5. Physiology, Ovulation And Basal Body Temperature.
    ( )
  • 6. Women may ovulate two or three times a month
    ( )
  • 7. Environmental Toxins and Infertility
    ( )
  • 8. Assisted Reproductive Technology (ART) Technique
    ( )
  • 9. Ovarian failure and polycystic ovary syndrome
    ( )
  • 10. Mittelschmerz
    ( )
  • 11. Increased Likelihood of Pregnancy Using an App-Connected Ovulation Test System: A Randomized Controlled Trial.
    ( )
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I last saw my period 23 to 26, Ad on sept 3 rd i had unprotected sex. Is it possible to be pregnant


Am suppose to see my period on the 13 of March but it not coming I did Pt test am not pregnant what can I do

nikie, Pakistan

I was trying to get pregnant but none of article really helped. However. one of my friend asked me to see the article to get pregnant. I never say no as always said yes and saw, Thanks to her to show me such a great site.

jakit, Myanmar

I have had unprotected sex with my boy friend on 21th August.My period start from 13 to 15 August.However,I got depo provera shot on 20th August.When I asked my doctor if there is any extra contraception need,she said No need.I am so worry I could get pregnant.Right me both me and my Bf has no intention to get baby.Is there any possible way to stop any pregnant to my issue.It will be appreciated for any suggestion.Please.

sammysmith, India

Now Plan your Good Pregnancy as you like with home check ovulation kit. You can now choose your time and date of pregnancy.
Visit company site where you can get the all information with ovulation video and you can buy it.


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