The most essential Pregnancy Calculator for women is the Estimated Date of Delivery or Due date of the Pregnancy Calculator. However, in some women, the story is not always the same. Reverse Due Date Calculator is the most important pregnancy calculator for them.
We know that most women have regular 28-day menstrual cycles. They don’t face any difficulty when they try to calculate the delivery date. However, there are women with irregular and infrequent cycles. They often don’t know about their date of conception. They can’t remember their Last Menstrual Period (LMP).
In such situations, regular pregnancy calculators functioning with “Naegele’s Rule” is not beneficial to them. They can use the “Reverse Due Date Calculator” to calculate most of the important dates of their pregnancy.
If you need to know how to manually calculate the Expected Date of Delivery or Due Date for your pregnancy, follow the link below.
How to calculate the Expected Date of Delivery / Due Date of pregnancy manually?
Also, you can visit our Online Due date Calculator
Calculate the Pregnancy Due Date Online
Importance of Reverse Due Date Calculator
We know that most of the management of the pregnancy totally depends on two important dates. That is the Last Menstrual Period (LMP) and the Expected Date of Delivery (EDD).
So you need to know at least one of them to determine the “Period of Amenorrhea (POA).”
Although the Reverse Due Date is limited to finding out the date of conception in some women, it has a wide range of benefits in the 21st century.
1. Find out the Last menstrual period if forgotten
Usually, some women have a habit of charting their menstrual dates in a calendar. Even though they don’t use some advanced techniques, this is good practice. However, most women can remember their Last menstrual period (LMP) whether they use a calendar or not.
However, it is common to forget the Last menstrual period with your busy lifestyle. This is common among highly technical workers.
However, If you have already visited your local General Practitioner, they might have recorded your LMP/ LRMP. But imagine that you are yet to see your GP. In such situations, you are in trouble.
Don’t worry! You can visit your GP. He will have a Dating scan and give you the “Expected Date of Delivery.”
So your GP will give you the LMP, POA, and all other essential details with a “Dating Ultrasound Scan” or Reverse Due Date Calculator technique.
2. Find out the Last menstrual period if irregular
In most pregnancies, it is not hard to calculate the important dates of the pregnancy. Because most women have regular cycles and can remember the LMP. In such situations, you do not need much technical knowledge to calculate pregnancy dates, including EDD, POA, etc.
You can calculate your Expected Date of Delivery using the manual method of calculating the Expected date of Delivery, Pregnancy Wheel, or one of the online EDD calculators.
However, as mentioned above, some women do not have regular dates for many reasons. Poly Cystic Ovarian Syndrome (PCOS) is the commonest reason for infrequent menstruation.
In such instances, the reserve due date calculator plays a significant role.
3. Calculate the date of Conception
Some people think that the date of ovulation and the date of conception is the two synonyms. But it is not.
The Date of the Ovulation is the date when you ovulate. You can experience it with the Basal Body Temperature (BBT), external facial and body features, etc.
Simply, the date of ovulation is the date your egg is released.
However, the date of conception is a different term. It means the date of sperm and the egg met each other. There is atleast a 12hour gap. As the human egg lives upto 24hours, the date of conception can be either the same as the date or the following date of ovulation.
How to calculate the date of conception from the due date?
Date of Conception = Due date – 9 months – 7days + 14days
(method of calculating the date of conception by due date)
= (Due date +7days )- 9 months
4. Confirm the Estimated Date of Delivery (EDD)
Modern moms are so technical and concerned about various technical issues. Even if they get an Ultrasound date of the Expected Date of Delivery, they might suspect that.
In such situations, the best option for confirming the due date is using the Reverse Due Date calculator.
How to clarify the due date using the reverse due date
- Enter the given due date to reverse the due date calculator
- Get the Last Menstrual Period with the calculator
- Compare your Last Menstrual Period with the given Menstrual Period by using a reversed due date calculator
- If the dates are identical, your ultrasound dating is correct.
5. Plan your Pregnancy
Some couples have different life goals. They need to adjust their life goals with the timing of pregnancy. Imagine you need to deliver a baby during a specific period.
Suppose you plan to have a baby on a specific date. In that case, you can adjust your sexual contact close to the Conception date given by the Reverses Due Date Calculator.
Example: You need to complete your family by 2026. Then you need to have 2 babies with 2 years gap. So you need to have 2 of your babies by December 2023 and December 2025. Then you will find dates for sexual contact using the reverse due date calculator.
6. Plan your IVF
Like the timing of your delivery in a natural way, you can time your IVF. You can use the date of conception for the IVF procedure.
How to calculate the LMP from the estimated date of delivery using the Reserve due date calculator?
When you need to know the Due date, it is a simple task to calculate your last menstrual period or gestational age.
But how to find out the date for conception for prolonged or shorter periods?
The usual formula is this:
Date of Conception = (Due date – 9 months – 7days) + 14days
(Date of Conception = LMP + Length of luteal phase)
So you need to adjust the length of the luteal phase according to the length of your cycle.
Reference:
- Pregnancy dating Vs Neonatal outcome
Merit Kullinger,corresponding author, Michaela Granfors, Helle Kieler and Alkistis Skalkidou, Discrepancy between pregnancy dating methods affects obstetric and neonatal outcomes: a population-based register cohort study, Sci Rep. 2018; 8: 6936.
Online at : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5932022/ - Ultrasound dating vs LMP date
Thorsell, M & Kaijser, Magnus & Almström, H & Andolf, Ellika. (2008). Expected day of delivery from ultrasound dating versus last menstrual period – Obstetric outcome when dates mismatch. BJOG : an international journal of obstetrics and gynaecology. 115. 585-9. 10.1111/j.1471-0528.2008.01678.x.
Online at: https://www.researchgate.net/publication/5518196_Expected_day_of_delivery_from_ultrasound_dating_versus_last_menstrual_period_-_Obstetric_outcome_when_dates_mismatch
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