Pregnancy Calculator

The pregnancy calculator also called the due date calculator, is used to find the baby’s due date based on your last period start date and average menstrual cycle length.

Consult 19 years experienced Chief Nutritionist Vasanthi for expert advice and a personalized diet plan. In-person consultation at HSR, Koramangala, Bellandur, Haralur, and video consultation across India.

Pregnancy Calculator To Find Baby Due Date

The pregnancy calculator is an easy way to calculate the due date based on your last period information and the duration of your menstrual cycles. A missed period is an indicator of your pregnancy.

• The due date is usually 38 to 40 weeks after conception.
• The World Health Organisation describes that normal pregnancy may range from 37 to 42 weeks.
• The length of the pregnancy may depend upon the age of the mother and the length of the previous pregnancy.
• According to a study, 4% of labor takes place on the exact due date, 60% of labor is within a week of the estimated date, and 90% is within 2 weeks of the calculated date.
• Pregnancy can be usually observed manually by a missing menstrual cycle, or by other symptoms like nausea, fatigue, increased basal body temperature, and increased frequency to urinate.
• Pregnancy can be detected with the presence of HCG hormones (Human Chorionic Gonadotropin, which is present only during pregnancy) in the clinical blood and urine tests usually 8-10 days after fertilization.

Due Date Calculator

The due date calculator reveals the birth time of the baby. Once your periods are missed, it’s time for a pregnancy test. If you were on a non-ovulation period, the chances of conception may be less.

• Counting 40 weeks to the first date of the last menstrual period is a common way to calculate the pregnancy’s due date. Ovulation starts 2 weeks after the start of the menstrual cycle.
• If an ovulation-predictor kit is used to find the ovulation dates, then the pregnancy due date can be calculated based on the conception date.
• If pregnancy has been made possible with IVF, the IVF transfer date can be used to calculate the due date. It is advised to wait for a few days after the missed period to know about the accurate due dates.

EDD Calculator

• The Estimated Due Date (EDD) is the date on which childbirth can occur spontaneously.
• The pregnancy calculator is the most commonly used method to calculate EDD.
• Other methods involve adding 280 days to the first day of the LMP (Last Menstrual Period). Ultrasound scans reveal the growth of the fetus with which the gestational age can be calculated.
• A pelvic examination may help reveal the date of pregnancy. A Doppler ultrasonography is used to sense the heartbeat of the fetus by 10-12 weeks. If the heartbeat is heard, then the baby would be 10-12 weeks old with which the EDD can be calculated.
• An incidence of preterm labor can be reported if the baby has growth restrictions, abruption of the placenta, and preeclampsia. If there is a twin, the EDD may be earlier than the assigned one.

Pregnancy Week Calculator

• The pregnancy week calculator helps to find the week in which you are traveling during pregnancy.
• The baby grows day by day and the body is subjected to changes all over the pregnancy.
• The first day of the menstrual period is considered for the pregnancy week calculation.
• 7 days are added to this date and subtract 3 months from the actual date to know the date of the birth of the baby.
• 1-2 weeks of pregnancy indicates the first month of pregnancy. The uterus prepares itself for the arrival of the fertilized egg.
• The other way to calculate the pregnancy week is LMP + 280 days = Estimated Due date

Pregnancy Month Calculator

• A typical full-term pregnancy lasts for about 9-10 months.
• The gynecologist tracks the pregnancy in terms of weeks rather than months to have clarity about the stages of pregnancy.
• If you have conceived for the first time, use our pregnancy calculator with the details of the first day of your last period to know your due date.
• The due date may be subject to change if you had irregular periods.
• If you don’t remember the LMP and if your period cycle is irregular, then an ultrasound scan provides the number of months remaining before the due date.
• In IVF, the insemination of the eggs in the uterus is known, so the IVF due date is calculated by adding 266 days to the date when the embryo was implanted.

Gestational Age Calculator

• Gestational age is calculated based on the date of your last periods.
• Gestation is the period between conception and childbirth.
• Ultrasound examination reveals the baby’s head size, abdomen, and thigh bone.
• This provides a clear idea about the growth of the baby in the womb.

Conception Calculator

• The conception calculator estimates the date of conception based on the due date of pregnancy, last menstrual cycle, and ultrasound examination.
• Conception occurs when a new egg is released into the fallopian tubes for fertilization.
• Ovulation starts two weeks after the menstrual cycle and usually lasts for 2-3 days.
• Sperms can stay active inside a woman’s body for up to a week.
• When it is difficult to assess the conception date, the conception calculator comes in handy.
• Ultrasound is the other way to know your conception date. This method is more reliable than data-based calculations.

FAQs

How to Calculate Pregnancy Weeks?

Count the number of weeks starting from your first day of LMP. Women may not be aware of their pregnancy in the first two weeks when the body prepares itself for the ovulation process.

What is the Due Date Calculator for IVF?

The due date calculator for IVF determines the date of transfer of the egg into the uterus. Your doctor knows the exact date of your conception in IVF. The due date is calculated by adding 266 days to the egg retrieval date.

When is My Due Date?

The due date of a pregnant woman is calculated from the first day of conception. Add 280 days to the first day of your last menstrual period to know your due date.

What is Pregnancy Calculator Chart?

A pregnancy Calculator chart is used to reveal the week in which you are traveling during your pregnancy.

Trimester	Month	Week
1st	1	1 – 4
1st	2	5 – 8
1st	3	9 – 13
2nd	4	14 – 17
2nd	5	18 – 22
2nd	6	23 – 27
3rd	7	28 – 31
3rd	8	32 – 35
3rd	9	35 – 40

Which Pregnancy Week Am I In?

Start counting the weeks from the first day of your last menstrual period till the present week to know your current pregnancy week.

What is the Pregnancy Calculator for Twins?

A pregnancy calculator for twins reveals the presence of twins with an ultrasound scan. The due date of single pregnancy is 40 weeks on average whereas the duration of a twin/multiple pregnancy may be at 36 weeks depending upon the type of twin pregnancy.

How to Calculate the Due Date for Twins By IVF?

The due date calculator for twins by IVF can be assessed by adding 38 weeks or 266 days to the egg retrieval date regardless of the own eggs/donor eggs.

What To Expect in Due Date Calculator?

The due date calculator helps to calculate the due date of pregnancy. The duration of pregnancy for full-term pregnancy is 40 weeks/280 days and this period is subject to change based on the mother’s health conditions and the growth of the fetus.

Ovulation occurs anywhere between 11 – 20 days after the first day of the last menstrual period as the sperm can stay active in the body for up to 5 days.

How to Use the Due Date Calculator Without Knowing the Last Period?

Due date calculator without knowing the last period can be calculated if the pregnant woman is aware of her last menstrual period. The due date can be calculated even if the particular week of the LMP is known.

If the woman doesn’t know her menstrual period dates, the doctor can suggest an ultrasound scan to assess the due date.

How Does the Pregnancy Calculator Works for Irregular Periods?

A pregnancy calculator for irregular periods reveals the approximate due date. An ultrasound scan can be used for women with irregular periods to determine their due date. An ultrasound reveals the length of the fetus from head to buttocks within the first trimester of pregnancy.

How to Use the Pregnancy Calculator for Embryo Transfer?

A pregnancy calculator for embryo transfer can be used with the details of the egg retrieval date. The embryo transfer can be either done through IVF or FET (Frozen Embryo Transfer) methods.

Whatever the embryo implantation methods, the due date is estimated by adding 266 days to the egg retrieval date. If it is a FET method, then the calculation would be

• 3 days FET = Transfer date + 266 days – 3 days (for embryos)
• 5 days FET = Transfer date + 266 days – 5 days (for blastocysts)

Are Due Date Calculators Accurate?

Due date calculators may not be accurate all the time. The actual due date and the calculation obtained from due date calculators may differ. The due date calculations may go wrong if the person has irregular periods.

It provides an approximate calculation of the date on which childbirth can happen. The exact due date may depend on the baby’s growth and fundal height.