Ovulation calculator

You are more likely to get pregnant during your ovulation period, so it is best to have sex then.
Average length of the menstrual cycle: days

Write down the start date and end date of your last menstrual period on your calendar. This will help you track your fertility and know when you’re ovulating:

Fertile Window
Approx Ovaulation

*This calculator is for informational purposes only and does not provide medical advice.

We understand that becoming pregnant is a beautiful experience. It can also be very special to share intimacy with your partner. There are some things you can do to increase your chances of becoming pregnant or to put it off for a while. An ovulation calculator can help you with both of these goals.

If you have sex during the days when you are not ovulating, the risk of pregnancy is lower.

  1. To use an ovulation calculator, you first need to know the date of your first day of your last period. This is easy to figure out. Say your last period began on the 12th of the month and ended on the 17th. That means your first day of last period was on the 12th.
  2. To find your average cycle length, you need to calculate the number of days between the first day of your last period and the first day of your next period. For example, if in March, your period started on 12th and in April, your period started on 10th, then your average cycle length is 30 days long.However, to get a more accurate reading, you should track your ovulation for four to five months. Let’s say that your average cycle length is 30 days long and it is 29 days long in March, 27 days long in May and 30 days long in July. The average cycle length would be 29 days long.
  3. Press on ‘Calculate’ to see when you are most likely to ovulate, when your fertility window is and when your next period will start. Please note that these are only rough estimates and your dates may differ from these calculations.

Why is ovulation calculation important?

Calculating your ovulation is important because it can help you if you want to have a baby, if you don’t want to have a baby, or if you want to know what symptoms mean that you are ovulating.

When am I most likely to get pregnant?

Ideally, ovulation lasts for about 12 to 24 hours. This is the time when your ovary releases an egg. If the egg is not fertilized by a sperm, it will dissolve or die in about 12 to 24 hours. This leads to shedding of the uterine lining, leading to menstruation two weeks later. However, this does not mean that you can only get pregnant during this one-day window. A sperm can stay in a woman’s body for up to five days. So, if you have unprotected sex during the six-day window which includes five days prior to the ovulation day and the ovulation day, there is a good chance you can get pregnant.

When should I see a doctor?

If you have Poly-cystic ovarian disorder (PCOD), it can affect your ovulation. If this happens, you should see a doctor to understand your ovulation cycle. Thyroid problems can also affect your ovulation cycle and can lead to premature menopause. If you have been diagnosed with an overactive or an under-active thyroid, consult a doctor. If you see any unusual occurrence, such as a period that is preponed or delayed by more than a week, unusually light or heavy discharge or excruciating pain, you must see a doctor.

What are the signs that show that I am not ovulating?

Even if you don’t ovulate, your body’s uterine lining breaks every month and you have your menstrual cycle. The signs that your body is not releasing an egg are:Heavier or lighter menstrual bleeding for the last few periodsExtremely painful periodsIrregular periodsSudden changes such as weight gain, drop in sex drive, growth of body hair or development of acne.

Quick tips:

  • It is important to keep track of your menstrual cycle and any symptoms you experience, such as abdominal cramping, breast tenderness, or mood changes. This will help you plan a pregnancy better.
  • Keep track of when you are ovulating by keeping a rough graph in mind.
  • Watch for symptoms that might happen before and after ovulation.
  • Take your basal body temperature every day for at least three periods. This will help you see a rise in your temperature shortly after ovulation, typically less than half a degree Fahrenheit.