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A Comprehensive Guide to Pregnancy Calculators

| 12 May 2023 | 1957 Views |


Embarking on the journey of pregnancy, especially through IVF, can be both exciting and nerve-wracking. At India IVF Clinic in Delhi, we strive to make the process as smooth as possible. One of the tools that can be incredibly helpful during this journey is a pregnancy calculator. In this guide, we’ll explore the various types of pregnancy calculators, how they work, and how they can assist you in your IVF journey. So, let’s dive right in!

Types of Pregnancy Calculators

Pregnancy calculators come in various shapes and sizes, each with its own unique features. Here are the most common types:

Pregnancy Calculator by Month

This calculator helps you determine your baby’s due date based on the first day of your last menstrual period (LMP). It divides the pregnancy into months, providing you with an easy-to-follow timeline.

Pregnancy Test Calculator

This tool predicts the best date for a pregnancy test, taking into consideration the average length of your menstrual cycle and the day of ovulation or conception.

Pregnancy Calculator in Days

With this calculator, you can find out how many days you are pregnant by entering the date of your LMP and the current date.

Pregnancy Calculator for IVF

This type of calculator is specifically designed for those undergoing IVF treatment. It calculates the due date based on the embryo transfer date, taking into account the age of the embryos at the time of transfer.

Pregnancy Calculator EDD (Estimated Due Date)

EDD calculators help you estimate your due date based on your LMP, cycle length, and ovulation date.

Pregnancy Calculator LMP (Last Menstrual Period)

Using your LMP, this calculator estimates your due date and provides a week-by-week breakdown of your pregnancy milestones.

Pregnancy Calculator by Ultrasound

This calculator determines your baby’s due date using the measurements taken during an ultrasound examination.

How Is Pregnancy Calculated?

Pregnancy is typically calculated from the first day of your last menstrual period. This method assumes a 28-day menstrual cycle and ovulation occurring on day 14. However, not all women have regular cycles or ovulate precisely on day 14. Therefore, it is essential to take into account your cycle length, ovulation date, and other factors when calculating your pregnancy.

How Are Pregnancy Weeks Calculated?

Pregnancy weeks are calculated starting from the first day of your last menstrual period. For example, if your LMP was January 1, you would be considered one week pregnant on January 8, two weeks pregnant on January 15, and so on.

Due Date for Pregnancy Calculator

To calculate your due date, follow these simple steps:

  • Determine the first day of your last menstrual period (LMP).
  • Add 280 days (40 weeks) to your LMP.
  • The resulting date is your estimated due date.

Keep in mind that this method assumes a 28-day cycle and may not be accurate for women with irregular cycles or those who ovulate later in their cycle.


Pregnancy calculators are valuable tools that can help you estimate your due date and track your pregnancy milestones. By understanding the different types of calculators and how they work, you can choose the one that best suits your needs. At India IVF Clinic in Delhi, we are dedicated to providing you with the support and guidance you need throughout your pregnancy journey. If you have any questions or concerns, please don’t hesitate to reach out to our team of experts.


Pregnancy calculators can provide an estimated due date, but they are not 100% accurate. Factors such as irregular menstrual cycles, late ovulation, and the varying lengths of each woman's pregnancy can affect the accuracy of the calculations. It is always best to consult with your healthcare provider for a more accurate due date.

No, pregnancy calculators cannot determine the gender of your baby. Gender is determined by the chromosomes inherited from the parents, and no calculation can predict this.

Yes, there are specific pregnancy calculators for IVF, which take into account the embryo transfer date and the age of the embryos at the time of transfer.

A pregnancy calculator by ultrasound uses the measurements taken during an ultrasound examination to estimate the due date. The most accurate ultrasound measurements are typically taken during the first trimester.

If you have irregular periods, it can be challenging to calculate your due date using a standard pregnancy calculator. In such cases, it's best to consult with your healthcare provider or use an ultrasound examination for a more accurate estimate.

Pregnancy calculators adjust the calculations for leap years by considering the extra day in February. This ensures that the estimated due date remains accurate.

Yes, there are many mobile apps available for both Android and iOS devices that provide pregnancy calculators and additional features like pregnancy tracking and milestone updates.

No, pregnancy calculators cannot predict your baby's birth weight. Many factors, such as genetics, nutrition, and overall health, contribute to a baby's birth weight, making it impossible for a calculator to predict accurately.

About The Author
Dr. Richika Sahay

MBBS (Gold Medalist), DNB (Obst & Gyne), MNAMS, MRCOG (London-UK), Fellow IVF, Fellow MAS, Infertility (IVF) Specialist & Gynae Laparoscopic surgeon,[Ex AIIMS & Sir Gangaram Hospital, New Delhi]. Read more

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