Ovulation Calculator

Knowing your most fertile days can increase your chances of getting pregnant, and knowing the likelihood of ovulation on a specific day may help you better understand your fertile window. Use our ovulation calculator to see the days you’re most likely to ovulate.

When am I likely to ovulate?

E.g., 16/04/2024
E.g. Cycle typically vary 23 to 35 days
Calculate your ovulation days
likelihood to ovulate on :
likelihood to ovulate this date
Results are based on the information you have provided.
Start of your last period
Likelihood to ovulate this day

How to improve the prediction?

Ovulation test is over 99% accurate in detecting the LH surge to identify your most fertile days

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Understanding your ovulation calculator results

There are many ovulation calculators available today that estimate when your fertile days will occur. These calculators are a form of ‘calendar method’ and work on average data without reading anything about your personal hormone levels.  However, none of us are ‘average’:

  • 1. Cycle lengths vary from woman to woman and cycle to cycle - in fact nearly 52% of menstrual cycles vary by 5 or more days2
  • 2. The timing of ovulation can vary by a few days, even in regular cycles.

Signs of ovulation

Ovulation is the name of the process that happens usually once in every menstrual cycle when hormone changes trigger an ovary to release a mature egg. This typically happens 12 to 16 days before the next period starts. These are the common signs and symptoms of ovulation.

  • LH surge
  • Temperature rise
  • Ovulation pain
  • Changes in saliva
  • Changes in cervical mucus

Top 10 pregnancy tips to help you get pregnant

1. Stop contraception

With some methods of contraception, such as the male and female condom, the cap, diaphragm and natural family planning, when you stop using the contraception your menstrual cycles and your fertility will not be affected. With other methods, such as the combined contraceptive pill and contraceptive injections, it can take some time for your menstrual cycles to return to normal after stopping the contraception. Although there is no reason you can't start trying for a baby immediately, some women like to wait a few months before trying, to re-establish their natural cycles, begin taking folic acid, and prepare their body fully.

2. Have sex at the right time

Did you know that one in two couples could be trying to get pregnant at the wrong time4? There are only a few days each month when a woman can become pregnant; having sex on the day of ovulation (when your body releases an egg) or the few days leading up to ovulation will maximize your chances of becoming pregnant.
At some point, you’ve probably heard that the average cycle is 28 days long, and that ovulation occurs on day 14. Both of these numbers are just averages from reported data. In reality, most women’s cycles don’t match this “average”. Tracking with an ovulation test will help you identify your individual cycle length and date of ovulation, not just a guess.

3. Take folic acid

Taking a folic acid supplement helps prevent neural tube defects in your baby such as spina bifida. For example, in the UK the Government's Chief Medical Officer recommends that women planning to get pregnant, or women who are pregnant, take a folic acid supplement containing 400 micrograms of folic acid every day, ideally starting three months before you start trying to conceive, and throughout the 1st trimester of your pregnancy5. If you eat a healthy diet, you will already get some folic acid from foods such as fortified breakfast cereals, beans, leafy green vegetables and orange juice, but it is important to still take supplements because it is very difficult to get the required folic acid amount through diet alone.

4. Eat healthy foods

To give your baby the best start, even before conception it’s a good idea to eat regular, balanced meals, lots of fresh fruit and vegetables and cut down on processed and 'fast' food. Make sure your diet includes:

  •  Carbohydrates - whole grain, pasta, rice and cereals are better than white bread, cakes and cookies
  • Fruit and vegetables - try to eat five portions a day, keepin mind that the more colorful the fruit or vegetable, the more nutritious it is.
  • Protein - you can get the protein you need from meat, fish, eggs, lentils and beans.
  • Milk and milk products - these contain lots of calcium, which is important for bone development
  • Fat - try to get your fat intake from vegetable sources like olive oil, or oily fish like salmon, sardines or mackerel

5. Avoid certain foods

  • Raw eggs and raw or undercooked meat or shellfish
    These may contain salmonella or other organisms which can cause food poisoning
  • Unpasteurized dairy products, liver or liver pâté and leftovers
    These foods can contain Listeria, which can lead to miscarriage or stillbirth.
  • Liver/liver products
    These contain high levels of vitamin A, which may be harmful for a developing baby so should be avoided.
  • Vitamin supplements not labelled "For Use in Pregnancy"
    Vitamins and other supplements should only be used if it says on the container they are safe to use in pregnancy. This is because some vitamins, if taken at high levels, are very dangerous for the developing baby. It is important to take folic acid as mentioned earlier, so either buy this as a single supplement or buy a supplement designed specifically to be used in pregnancy.
  • Be careful with medication
    Discuss any medication you're taking with your doctor and also, make sure you speak to your doctor before stopping any prescribed medication you are taking. Let the pharmacist know you're pregnant if you need any over-the-counter medicine. Even simple remedies like decongestant nasal sprays can contain ingredients that should not be used when pregnant.
  • Be aware of toxoplasmosis
    Unwashed vegetables, undercooked meat and cat feces carry the risk of toxoplasmosis – which can cause miscarriages, stillbirth or damage to your baby. So always wash fruit and vegetables, only eat thoroughly cooked meat and wear gloves when you're gardening or emptying cat litter trays.

6. ​Stay fit and maintain a healthy body weight

Pregnancy puts a lot of strain on your body so getting fit before pregnancy will help you after you conceive. If you're fit before you get pregnant, it will be easier for you to stay active when you are pregnant. Exercise can help to improve your mood and energy levels. It, also reduces stress, which is a good thing when it comes to conceiving. Being a healthy body weight can help you to get pregnant, so the best thing is to try and achieve as ideal a weight as possible before trying to get pregnant. Your doctor will be able to give you information about a healthy weight for you.

7. Stop smoking, recreational drugs, alcohol

It's best to avoid smoking, recreational drugs and alcohol while you are trying to get pregnant and throughout your pregnancy.

If you smoke or take recreational drugs then giving up will improve your chances of having a healthy pregnancy and a healthy baby.

Drinking in pregnancy can lead to long-term harm to your baby, with the more you drink the greater the risk. If you are pregnant or planning a pregnancy, the safest approach is not to drink alcohol at all, to keep risks to your baby to a minimum. If your partner smokes, drinks or takes drugs then it is also important that they cut down on these substances (and ideally, stop them altogether) while you are trying to get pregnant. Apart from the secondary effects on you, cigarettes, recreational drugs and alcohol can all have an adverse effect on the quality of sperm.

8. Get your rubella vaccination

Rubella, also known as German measles, can seriously affect unborn babies. It's a good idea to check that you're fully protected against rubella if you're planning to have a baby. Talk to your doctor about your vaccination history6.

9. Optimize vaginal health – use a sperm-friendly lubricant

Vaginal dryness is more common than we may think. In a study across 11 countries involving over 6,500 women, up to 18% of women aged 18–34 years reported always or usually experiencing vaginal dryness7. This can be worse when trying to conceive as there is a tendency to have lots of baby-making sex. Some of the most commonly available lubricants can be harmful to sperm – so be sure to use a sperm-friendly lubricant.
If you have any abnormal vaginal discharge, it is worth speaking to your doctor. Common vaginal infections, such as bacterial vaginosis or thrush, can be treated easily and make trying for a baby easier.

10. Get your partner involved - here are some ways to help him create healthy sperm

  • Stay fit and healthy
    Your partner should try to be as active as possible, reduce alcohol, stop smoking and eat a healthy diet.
  • Use sperm-friendly lubricant
    Make sure any lubricant you use isn't 'spermicidal' or toxic to sperm. You can buy 'sperm-friendly' lubricants that are specially formulated.
  • Keep testes cool
    Your partner should wear loose underwear and avoid hot baths. Consistent or prolonged 'heating' of the testes can reduce sperm quality.
  1. Study of 101 women in the UK comparing a simple calendar method to likelihood of conducting a test on LH surge day (2011).
  2. Creinin MD., et al. Contraception (2004) 70: 289-92 - https://www.ncbi.nlm.nih.gov/pubmed/15451332
  3. Brezina PR., et al. Fertil & Steril (2011); 95(6): 1867-78 - https://www.ncbi.nlm.nih.gov/pubmed/21324446
  4. Johnson SR., et al. Hum. Repro. (2011) 26: i236
  5. Leiblum SR., et al. J Sex Med. (2009) 6: 2425–2433.
  6. http://www.nhs.uk/Conditions/Rubella/Pages/Prevention.aspx accessed 2/5/2017
  7. NICE Clinical Guideline [CG62] – Antenatal care for uncomplicated pregnancies. Published March 2008. Updated January 2017.

How to get pregnant faster?

Having sex at the right time of your cycle is key, so identifying your fertile days with an ovulation test will help you get pregnant faster.