A Pregnancy Due date is the most important date of pregnancy as it is the most memorable day of the pregnancy journey but the Due Date calculator or Due Date Calculation look so complicated to most of us.
There are too many Pregnancy Due Date Calculators available these days but instead of using them, I recommend that you must learn How to calculate your pregnancy in weeks or months on your own. For your reference, I have listed below all methods related to due date calculation in normal and IVF pregnancy.
- Menstruation calculator Pregnancy or Pregnancy Due Date Calculator
- 100 percent accurate ovulation calculator
- Pregnancy Weeks
- How to Calculate pregnancy Weeks into month
- When did I conceive and how many weeks am I
- How pregnancy Due Date is calculated
- How do I know how many weeks Pregnant I am without knowing last period
- How is IVF due date calculated
- Final Word
Menstruation calculator Pregnancy or Pregnancy Due Date Calculator
100 percent accurate ovulation calculator
Pregnancy is a duration of 9 months and can last around 40 weeks to 42 weeks ( but not beyond 42 Weeks) from the date of the Last mensuration period. This Whole duration can further be break up into three trimesters of 3 months each.
Each trimester has its own importance in fetal growth and the pregnancy cycle. Each trimester is linked to different mood swings and morning sickness.
if you want to learn more about each pregnancy trimester in detail then read our detailed articles on
How to Calculate pregnancy Weeks into month
Pregnancy weeks conversion to pregnancy month calculation is not difficult at all. You can easily calculate or convert your pregnancy week into month based on the table information mentioned below.
Note: Pregnancy First week starts from the date of the last mensuration period
Pregnancy Week by Week Picture with Pregnancy Week and month chart
How many Weeks Pregnant am I
Pregnancy week-by- week pictures
When did I conceive and how many weeks am I
Women conceive at the time of Ovulating only -this is the period when women’s ovaries release a new egg. This is the best time to conceive the baby for any expecting couple.
Ovulation usually occurs in mid of the menstrual cycle. if your menstrual period is of 28 days then your ovulation will occur between around 13 to 17 days after your last mensuration period. Hence your exact conceive date will be in between these days only.
But there is one big issue in it- Hardly any women know the exact date of her Ovulation. In many cases, the menstrual cycle duration may vary due to individual hormonal, age, or any health-related issue and It may cause an irregular menstrual cycle and may shift the Ovulation date nearer or farther away to the Last mensuration period date.
To resolve this issue doctors recommended considering the day after the last mensuration period as conceive date to calculate the weeks of pregnancy.
How pregnancy Due Date is calculated
Any expecting mother can calculate her due date with this simple calculation. Due date calculation is completely based on the date of the last mensuration period.
To calculate the Due date just add one year to your last mensuration period then subtract 3 months from it and at last add 7 days to it. For example
Steps to Calculate Pregnancy Due Date
If your date of last mensuration period is 1st of January 2022
Step 1: Add one year to your date of the last mensuration period i.e one year add to 01/01/2022. – step 1 final date will be 01/01/2023
Step 2: Subtract 3 months to step 1 final date i.e subtract 3 months to 01/01/2023 – step 2 final date will be 01/10/2023
Step 3: Add 7 days to Step 2 final date i.e 7 days added to 01/10/2023 – Final due date will be 08/10/2023
So in the above case pregnancy, the due date will be 08th of October 2023.
How do I know how many weeks Pregnant I am without knowing last period
The whole calculation of the Due Date is based on the Date of the Last mensuration period but what if you do not remember the date of your last mensuration period. Well in that case there are some other ways to calculate the exact Due date.
Below I have mentioned a few such ways that can help you out in this :
Date of Intercourse
If you know the date of your intercourse then you can somewhat figure out the approx date of your conception. As per many scientific studies, it is found that after intercourse the sperm can live in glands of the cervix for up to 5 days and sperm can fertilize the egg in the uterus between these 5 days only. so if you know the intercourse date then your conceive date will be in between those 5 days after the intercourse date only.
Ultrasound is an efficient and effective method to calculate a more accurate Due date. During the early pregnancy period through Ultrasound, the doctor measures the fetus crown rump length i.e the length of the fetus from one end to another end this will help them to estimate the exact age of the fetus( baby). With this data, doctor can easily estimate your due date even without knowing your last Mensuration period.
Fetus HeartBeat is directly related to the Fetus’s age. A good Doppler can easily estimate the Due date by knowing the Fetus’s heartbeat. This Due Date estimation is more accurate when Heartbeat calculates in between the 10th to 12 weeks of pregnancy.
For reference below chart shows how the fetus heartbeat changes with pregnancy week
|Fetal Age||Fetus Heartbeat Range|
|5 Weeks||80-103 ( BPM)|
|9 Weeks||155-195(Average 175 BPM)|
|12 Weeks||120-180(Average 150 BPM)|
|after 12 Weeks||120-160(Average 140 BPM)|
Fundal Height is the distance from the top of the uterus to the pubic bone. By knowing this distance after the 24th week of pregnancy the age of the baby can be easily estimated. The expectation is that after week 24 of pregnancy the fundal height will match the number of weeks of pregnancy — plus or minus 2 centimeters i.e if the Fundal height is 27 Centimeters then the age of the fetus will be 27 weeks.
How is IVF due date calculated
IVF or In-vitro fertilization (IVF) is the only method where your doctors know the exact date of your conception. IVF is the process in which the Egg was fertilized outside your body ( in laboratories ), later the fertilized egg (zygote) undergoes embryo culture for 2–6 days, and then it is implanted in a female uterus for a successful pregnancy.
To calculate the IVF due date just follow these 3 simple steps
Steps to Calculate IVF due date
Step1: Find your Egg transfer date to your uterus. E.g suppose your egg transfer date is 1st January 2022
Step 2 : Add 266 days to your Egg transfer date .I.e 01/01/2022 + 266 days so step 2 date is 24 September 2022
Step 3: Subtract days of an embryo from step 2 date e g. if embryos age is 3 days old then subtract 3 days from step 2 date i.e 24 September 2022 minus 3 days i.e 21 September 2022.
thus if your Egg transfer date is 01st January 2022 then your IVF Due date will be 21st September 2022.
Through this simple method, you can easily calculate your exact IVF Due date.
Each pregnacies is different from others as each baby’s growth is a little different. There are no such things as perfect or accurate Due Date or pregnancy delivery date. Each method mentioned above will give only an estimated or expected due date. Only about 5 percent of deliveries actually take place on their due date. Being the parent you should not much worry about getting the perfect due date because the baby will take birth when they are ready for it . Instead of the Due date, the baby’s growth and proper development are more important. Pregnancy is a memorable time and you should enjoy this journey by making a love bond with your baby before birth – rest all you have to leave on nature. It is always advisable that instead of taking due date stress-you’ll just have to wait for the baby to arrive in his own time, like everyone else for both mother and baby benefit.
To ready about pregnancy trimester do read our detailed guide on the pregnancy trimester and morning sickness