Ovulation Schedule – Test, Calendar & Due Date Calculator

What is Ovulation?

Ovulation is the release of a mature egg cell from the ovaries, marking the onset of the most fertile period in a woman’s cycle. The egg (also referred to as an oocyte or ovum) travels down the fallopian tube where it may be fertilized by a sperm. Identifying the most fertile period is important when planning conception.

ovulation_scheduleOvulation is controlled by two female hormones, known as follicle-stimulating hormone (FSH) and luteinizing hormone (LH) which may be monitored in cases of infertility or difficulty in conceiving. A regular menstrual cycle lasts between 28 to 32 days although a cycle as short as 26 days or as long as 35 days is considered within the norm. Ovulation usually occurs approximately 14 to 16 days before the next period but this may vary depending on the length of the individual menstrual cycle. The most fertile period is considered to last approximately 3 to 4 days within the cycle starting a day or two before ovulation. If the egg cell is not fertilized within this time period, it is ‘discarded’.

Signs and Symptoms of Ovulation

  • Vaginal discharge
  • Breast tenderness
  • Abdominal bloating, especially of the lower abdomen
  • Mood changes, especially in cases of PMS (premenstrual syndrome)
  • Slight discomfort noticed in the lower abdomen. In some women, there may be cramping or mild pain.

Ovulation Tests

Women who are planning to conceive may consider testing for ovulation to verify when they are in the most fertile period. There are a number of ways to test for ovulation, some of which are not  widely used.

  • Basal body temperature (BBT) increases between 0.5 and 1 degree celsius during ovulation and with repeat testing on a daily basis, this slight increase may be isolated. This is not an accurate method for estimating ovulation and is not commonly used any longer.
  • Urine tests to detect luteininzing hormone is another consideration. These home tests will detect the increase in luteininzing hormone up to 2 days prior to ovulation. A false positive test result may occur in women with certain hormone disorder that increases luteinizing hormone like
  • A female hormone screen, sometimes referred to as a fertility screen, is a blood test to monitor individual hormone levels. Follicle-stimulating hormone (FSH), luteinizing hormone (LH), progesterone and estrogen are monitored at a specific time in the menstrual cycle and this test should be conducted and evaluated by your gynecologist.

Ovulation Schedule & Calender

Calculating your date of ovulation can be useful for estimating the most fertile period in your cycle. In order to monitor your menstrual cycle, it is important to first establish the length of the cycle. Mark the first day of your period on a calendar for at least 6 months. The number of days from the first day of one period to the first day of the consecutive period is the length of your menstrual cycle. Ideally, the length of your cycle should be the same number of days every month. Ovulation usually occurs at day 14 in a menstrual cycle that is 28 days long. A cycle shorter than 22 days may be an indication of issues relating to ovulation and you should consult with your gynecologist.

It is not advisable to use your ovulation schedule for preventing pregnancy (billings method of contraception) since the human sperm may last within the uterus for more than 1 day. Suitable birth control options should be used for contraception. Refer to the article on No Period for causes of absent menses if a pregnancy test is negative.

Fertility & Due Date Calculator


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  • cherokee

    I had my last period on Sept 13th thru the 17th, no period for the month of October, had sex with my husband on October 5th 2010 during my ovulation period, took a pregnancy test four times after missed period in October, all were negative. Here it is November 15th 2010 and now my period is here. can someone tell me what is going on here. Can I still be pregnant? Because I have some of the symptons as signs of being pregnant.

    • Dr. Chris

      Hi Cherokee

      It is possible that you are pregnant and just as possible that you are not. Medically, every woman of fertile age is considered pregnant until proven otherwise. . Bleeding after falling pregnant, may occur for the first month or two (sometimes three) but it will be very light and should always be investigated as it may be a threatened abortion. There is no way of knowing if you are pregnant without doing a pregnancy test. Ask your doctor about doing a qualitative and quantitative (not necessary) bHCG blood test. This, along with an ultrasound, will tell you conclusively if you are pregnant. Until then, assume you are pregnant until your doctor proves otherwise.

  • cherokee

    Hello Dr. Chris

    This is Cherokee. I have read your posted comment. Now there is something else I need to know ofr sure. I had a period in Nov. from the 14th -18th, then five days later had sex with my husband for 5 straight days, and then on Thursday Dec. 2 I was vomiting, headache, upset stomach, then on Fri. Dec. 2 couldn’t stand the smell of food, on Sat. Dec 4th woke up with a spot of blood, an hour later I checked there is nothing, plus I have been eating crazy since Thursday. I did a pregnancy test on Fri., it came back negative. Now what do I do about this situation at hand?

    • Dr. Chris

      Hi Cherokee

      You should see a gynecologist. It is unlikely but not impossible that you fell pregnant so soon after your period ended. There is a possibility that the symptoms you experienced are totally unrelated to pregnancy or your menstrual cycle but may be a gastrointestinal disturbance of some sort. It is also possible that you hormone levels are out of sync and spikes of hormones like estrogen (possibly) is causing these symptoms. Your gynecologist will need to examine you further and if necessary conduct a hormone screen (blood test) to monitor the fluctuations in your hormone levels and verify that it is within the expected range of that stage of your menstrual cycle. Don’t leave this unattended. Remember that you may still be pregnant. See a doctor and do a pregnancy blood test known as a qualitative beta-HCG.

  • stacy

    i had my period on the 26 od december when is the best for me to have sex so i can ovulate

    • Dr. Chris


      Ovulation does not depend on sex. You will need to know the length of your menstrual cycle in order to use the online calculator above. Assuming that you have a 28 day cycle and the first day of your last period was December 26th, 2010 then you should ovulate in the period between 7th January to 11th January. This is just an estimate. You should speak to your gynecologist.