The **Gestational Age Calculator** estimates pregnancy duration using various methods: LMP, conception date, ultrasound, and IVF.

## Gestational Age Calculator By LMP

## Gestational Age Calculator By Conception

## Gestational Age Calculator By Ultrasound

## Gestational Age Calculator By IVF

**Note**: This calculator provides estimates for your due date and gestational age based on the information you input. It is not a substitute for professional medical advice. Consult a healthcare provider for personalized guidance.

Gestational age is the number of weeks and days that a baby has been in the womb.

It is usually measured from the first day of the last menstrual period (LMP) to the current date.

However, there are other methods to estimate gestational age, such as using ultrasound measurements, date of conception, or date of embryo transfer.

**Here are some steps to calculate gestational age using different methods:**

## Using LMP:

The Gestational Age Calculator by Last Menstrual Period (LMP) is a tool that estimates the gestational age of a pregnancy based on the date of the woman’s last menstrual period. Gestational age is the age of the pregnancy calculated from the first day of the last menstrual period and is used to estimate the due date of the baby’s birth.

**How It Works:**

**Input LMP Date:** The user provides the first day of their last menstrual period (LMP) by entering the day, month, and year into the respective fields.

**Cycle Duration:** The user selects their average menstrual cycle duration from a dropdown list. This value represents the number of days between the start of one period and the start of the next.

**Calculate Button:** Upon clicking the “Calculate” button, the calculator processes the input data and performs calculations to estimate the due date and gestational age.

**Calculation Process:**

- The calculator uses the LMP date and the selected cycle duration to estimate the due date. It adds 280 days to the LMP date, where 280 days is the average length of a pregnancy. This estimated due date is displayed.
- The calculator also calculates the number of weeks and days the user is currently pregnant by comparing the LMP date with the current date. This information is displayed as “Weeks Pregnant.”
- The gestational age is calculated by dividing the difference in days between the LMP date and the current date by 7 to get the number of weeks, and the remaining days are shown as “Gestational Age.”

Suppose you enter the following information for the last menstrual period (LMP):

- LMP Date: May 10, 2025
- Average Cycle Duration: 30 days

After clicking the “Calculate” button, the calculator performs the calculations.

The calculator would display the following information:

- Estimated Due Date: February 14, 2026
- Weeks Pregnant: You Are Currently 14 Weeks Pregnant
- Gestational Age: Your Gestational Age Is 14 Weeks and 1 Day

Another example you can check:

- LMP Date: May 10, 2024
- Average Cycle Duration: 30 days

After clicking the “Calculate” button, the calculator performs the calculations.

The calculator would display the following information:

- Estimated Due Date: February 14, 2025
- Weeks Pregnant: You Are Currently 14 Weeks Pregnant
- Gestational Age: Your Gestational Age Is 14 Weeks and 1 Day

## Using conception date:

The Gestational Age Calculator by Conception Date is a tool that estimates the gestational age of a pregnancy and calculates the due date based on the date of conception. This method calculates pregnancy duration by considering the time that has passed since conception. The tool takes the user’s input of the conception date and uses it to estimate various aspects of the pregnancy.

Here’s an overview of how the method works:

**Input Conception Date**: The user provides the date of conception by selecting the day, month, and year from the input field.

**Calculate Button**: Upon clicking the “Calculate” button, the calculator processes the input conception date and performs calculations to estimate the due date and gestational age.

**Calculation Process**:

- The calculator first calculates the due date by adding 266 days (38 weeks) to the input conception date. This is the average length of a pregnancy counted from conception.
- Next, it calculates the total number of days that have passed between the conception date and the current date.
- Using the total days, the calculator calculates the number of weeks and days of pregnancy. It divides the total days by 7 to get the number of weeks and calculates the remaining days.
- The calculator determines the trimester based on the number of weeks. If the number of weeks is less than 14, the user is in the first trimester; if it’s between 14 and 27, the second trimester; otherwise, the third trimester.
- The calculator also calculates the percentage of the pregnancy completed by dividing the number of weeks by 40 (full-term) and multiplying by 100.

**Display Results**:

- The calculator displays the estimated due date in the format of “Month Day, Year.”
- It provides the gestational age in weeks and days, along with a statement indicating the current week of pregnancy.
- The trimester the user is in is displayed.
- The percentage of completion of the pregnancy is shown.

Suppose you enter the following information for the conception date:

Conception Date: June 15, 2024

After clicking the “Calculate” button, the calculator performs the calculations.

The calculator would display the following information:

- Estimated Due Date: March 8, 2025
- Gestational Age: Your Gestational Age Is: 31 weeks and 3 days.
- You are currently at week #31 (31 weeks 3 days) of pregnancy.
- You are in the third trimester.
- You are 77.50% of the way through your pregnancy.

## Using ultrasound:

The Ultrasound Due Date Calculator estimates the gestational age of a pregnancy and provides information about the estimated due date, current weeks of pregnancy, and additional details such as the average baby length, weight, and conception date. This method uses input from an ultrasound date and the length of pregnancy at the time of the ultrasound.

**How It Works:**

**Input Data:**

Ultrasound Date: User enters the date of the ultrasound.

Length of Pregnancy: User enters the number of weeks and days of pregnancy at the time of the ultrasound.

**Calculate Button:**

Upon clicking the “Calculate” button, the calculator processes the input data and performs calculations to estimate the due date, gestational age, and additional details.

Suppose the user enters the following information:

Ultrasound Date:

08/01/2024

Length of Pregnancy at the Time:

Weeks: 20 and Day: 1

The calculator would display the following information:

- Your Gestational Age Is: 20 weeks 1 day
- The estimated due date is: 12/18/2024
- Current week of pregnancy: 20 weeks 1 day
- Average baby length: 10.12 inches (25.7 cm)
- Average baby weight: 0.73 pounds (331 grams)
- Conception date: 3/13/2024

## Using embryo transfer date:

The IVF (In Vitro Fertilization) Gestational Age Calculator is a tool designed to estimate the gestational age of a pregnancy and provide information about the due date and the development of the baby based on the IVF method. This calculator takes into account the method of embryo transfer (3-day embryo transfer, 5-day blastocyst transfer, or other), the transfer date, and, if applicable, the embryo’s age at the time of transfer. By inputting these details and clicking the “Calculate” button, users can obtain an estimation of their pregnancy’s progress and development.

**How It Works:**

**Estimate Based On:**The user selects the method of embryo transfer from a dropdown list. This could be a 3-day embryo transfer, a 5-day blastocyst transfer, or another method.**Transfer Date:**The user inputs the date of the embryo transfer using a date picker.**Embryo Age:**If the user selects “Other” as the method, they need to manually enter the embryo’s age in days at the time of transfer.**Calculate Button:**After providing the required information, the user clicks the “Calculate” button.**Calculation Process:**The calculator processes the input data and performs the following calculations:

- It calculates the estimated due date by adding a specific number of days to the transfer date, based on the selected method. For a 3-day embryo transfer, it adds 280 – 3 days; for a 5-day blastocyst transfer, it adds 280 – 5 days; for other methods, it subtracts the embryo age from 280.
- It calculates the weeks pregnant by determining the number of weeks between the transfer date and the current date.
- It estimates the baby’s length and weight based on the weeks pregnant. These estimates increase as the pregnancy progresses.

**Output:** The calculator displays the following information:

- Gestational age in weeks.
- Estimated due date.
- An average estimation of the baby’s length and weight.

Suppose you select:

- Method: 3-day embryo transfer
- Transfer Date: June 10, 2024

After clicking the “Calculate” button, the calculator performs the calculations and displays:

- Your Gestational Age Is: 11 weeks.
- The estimated due date is March 16, 2025.
- On average, your baby is around 2.86 inches long and weighs around 0.68 pounds.

This IVF Gestational Age Calculator helps individuals who have undergone IVF procedures to estimate their pregnancy progress and due date while considering the specific circumstances of embryo transfer and age.