HomeFeaturesSafe Days Calculator | Safe Period Calculator - Pregajunction

Safe Days Calculator | Safe Period Calculator – Pregajunction


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The safe days calculator from Prega Junction allows you to calculate the safer days in your menstrual cycle that won’t result in a pregnancy. The accuracy of the results is subject to the data entered by the user.

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What is the significance of the Safe Period Calculator?

It is a myth that unprotected sex always results in a pregnancy. If you want to be a responsible adult and be sexually active but not pregnant, tracking the safe days in a menstrual cycle is ideal. This estimates the days when engaging in sexual intercourse without contraception won’t result in a pregnancy.

The significance of the safe period calculator is to make the estimation of the safe days a lot easier and streamlined.

What are Safe or Infertile Days?

Safe days or infertile days are the specific days in your menstrual cycle that carry minimal chances of pregnancy. These days are part of the “safe window” when individuals can have sexual intercourse without using any kind of protection or contraception.

They are considered menstrual cycle safe days because there is no ovulation involved in those days. This ensures that no released eggs in the reproductive tract are fertilized, thereby not resulting in a pregnancy.

When does Ovulation Occur?

Pregnancy is heavily related to ovulation. Only when a healthy, potent, and mature egg is released into the reproductive tract can a sperm enter and fertilize it. So, it isn’t surprising that women actively trying to get pregnant track their ovulation to engage in sexual intercourse with their partner.

Ovulation occurs 14 days right before the start of the next menstrual cycle. Women who have a regular menstrual cycle of 28 days can easily count their ovulation days. However, for women with irregular periods, it becomes a difficult job.

As a rough estimation, take the first day of the previous menstrual cycle as the starting point, and 14 days from then should be when you ovulate.

Women are in their most fertile window four days before ovulation and three days after ovulation. Engaging in unprotected sex during this period can result in a pregnancy.

How do I calculate the Safe Days?

If you don’t want to do it manually, we’d recommend using Prega Junction’s Safety Period Calculator for the same.

However, if you want to do it manually to ensure a more accurate estimation keeping all factors in mind, we’d recommend following the different phases of the menstrual cycle.

An average menstrual cycle lasts for 28 days and is divided into three phases – follicular phase, ovulation, and luteal phase. The first day of your period is counted as the first day of a new menstrual cycle in a woman.

To calculate your safe days, we’d recommend understanding each phase in the menstrual cycle. They are as follows:

Follicular phase

This is alternatively known as the pre-ovulation phase that involves follicular maturation in the ovaries. It ends with active ovulation with two potent hormones – estradiol and follicular stimulating hormone (FSH).

Ovulation phase

As the name suggests, the mature follicle releases the egg into the female reproductive tract, preparing for fertilization. Indulging in unprotected sex during this phase might result in a pregnancy.

Also Read: https://pregajunction.com/ovulation-calculator/

Luteal phase

The post-ovulation phase is the last phase of the menstrual cycle that results in the formation of the corpus luteum, hence the name. The corpus luteum regulates the production of estrogen and progesterone in the female body in case of a viable pregnancy. If the egg isn’t fertilized, it undergoes degradation and is shed with the endometrium during menstruation.

For calculating your Safe Days, follow the steps:

  • Go over the menstrual cycle calendar for the last six months and pick the cycle with the shortest days. From the total number of days in the cycle, subtract 18. Keep a note of the number of days left.
  • Note the date of the first day of your last period. Add the number of days you got from the previous step from that date. Mark it as “A.”
  • Here, A is your unsafe days, meaning if you engage in unprotected sex during this phase, you will likely end up pregnant.
  • From the last six months of your menstrual cycle calendar, pick the cycle with the longest days. Subtract ten days from the total days in the longest cycle.
  • Similarly, consider the first day of your last menstrual cycle and add the remaining days from the previous step. Mark it as “B.”
  • The days between A and B are your safe days for not getting pregnant.


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Disclaimer: Prega Junction doesn’t store or misuse any of the data entered by the users. All the data entered are safe and won’t be compromised in any way, including names, personal information, passwords, identity verification, etc.

Somapika Dutta (B.Sc Physiology, Honours)
Somapikar holds Bachelors Degree in Physiology from University of Culcutta. She has 6+ years of experience writing in different niches, including health, tech and lifestyle. An animal enthusiast and a raging foodie, experiencing life - one day at a time.


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