How To Find Out How Far Along You Are
Use this pregnancy computer to calculate your due date, see how many weeks pregnant you are and approximate your probability of giving birth on dissimilar dates.
What is my due date?
Your due date, also known every bit your estimated appointment of commitment, is the guess appointment your labor might begin. Your estimated due date is commonly calculated by adding 280 days (40 weeks) to the date of the first twenty-four hour period of your last period, using Naegele's rule.1 This may vary if you have irregular periods.
It'south worth noting that although predicted due dates are commonly calculated at 280 days, a infant is born on its predicted due date but five% of the time.2 A 2020 study published in the International Journal of Obstetrics & Gynaecology suggests a number of factors that can influence the length of your pregnancy, including ethnicity, tiptop, variations in the menstrual cycle, the timing of ovulation, parity and maternal weight. It is for this reason that calculations using Naegele'southward dominion can be considered every bit an estimate and not a definitive date.3
How far along am I?
To calculate how many weeks significant you lot are, our pregnancy calculator looks at the outset day of your concluding menstrual period (LMP) and compares it to today's date. The offset day of your LMP counts as the kickoff twenty-four hours of your pregnancy. This adding is based upon an average wheel of 28 days. If your bicycle is different to 28 days, your calculation will vary based upon this.
You volition find that the sonographer at your offset ultrasound scan (frequently called the dating scan) will give you a more than accurate idea of how many weeks pregnant you are past measuring your infant from its head to its lesser to form a determination.
If you lot desire to calculate an estimated due engagement manually using Naegele'due south dominion, here'south how to do it:
- Find out the first solar day of your concluding menstrual period
- Subtract 3 months from that date
- Add together 1 yr and vii days
How many weeks are you significant for?
Effectually 90% of pregnancies last betwixt 37 and 42 weeks.1 If a baby is born before 37 weeks, he/she is considered preterm or premature.
The iii trimesters
In that location are iii trimesters in a pregnancy, with around 13 or 14 weeks per trimester:
- Beginning trimester: Weeks 0 to 12
- Second trimester: Weeks 13 to 27
- Third trimester: Weeks 28 to 40+
You can read more about the three trimesters in this article about the stages of pregnancy.
When will my baby be built-in?
This pregnancy calculator uses one of ii methods to work out when your infant might be born. If y'all fill up in the outset date of your last period, it takes that date and adds 40 weeks (assuming you've chosen a 28 day average cycle). If you've chosen a different bike, it will add or subtract days based upon that. If you choose to calculate by ultrasound date, the calculator will piece of work out your due date based upon how far along you are on that date. This will probable yield a more accurate result.
The 280 day figure is based upon Naegele's Dominion and is the most common method of computing due dates. German language obstetrician Franz Naegele created his formula in 1812 and it has been referenced ever since.
How accurate is this pregnancy calculator?
Information technology is of import to call up that this pregnancy calculator is meant to be a bit of fun and the results incorporate guesswork (as with all 'predictions' near the future). Assuming a natural nascence, there's no way of knowing for certain when your baby will get in. It is worth noting that merely five% of babies arrive on their due date.one The vast majority are born two weeks either side. This computer, equally with all due engagement calculators, should exist used just equally a guide, to requite you a picayune help with planning for your baby'southward inflow.
At the bespeak of 42 weeks, births are normally considered 'mail-term'. If y'all reach this bespeak, your hospital volition likely induce labour for the safe of the baby. You can learn more about this and about due dates in this commodity by the Essential Parent website .
How exercise your due engagement charts work?
The due engagement charts show possible due dates based upon data from a birth survey carried out past Spacefem.com.4 The survey relied upon correct information being input past each of the 9,000+ Mums who took part; information technology was non a peer reviewed scientific study. Information technology'due south important to call up that your birth appointment probability will vary based upon many factors, including your age, health, ethnic origin and whether you've given birth earlier.
Calculator created by Alastair Hazell and reviewed by Aaron Kandola. Estimator references
Source: https://www.thecalculatorsite.com/health/pregnancy-calculator.php
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