Calcolatore della data presunta del parto
Calcola la data presunta del parto da ultime mestruazioni, concepimento, transfer FIVET o ecografia, con a che punto sei, il trimestre e le date importanti.
How is my due date calculated?
It's 280 days (40 weeks) after the first day of your last period, adjusted for your cycle length. From conception it's 266 days later. After IVF it's worked out from the transfer date and the embryo's age.
My cycle is longer than 28 days. Does that change my due date?
Yes. A longer regular cycle moves the due date later by the difference, and a shorter one moves it earlier. A 32-day cycle moves it 4 days later.
How do I work out my due date after IVF?
Add 263 days to the transfer date for a day-3 embryo, 261 days for a day-5 embryo and 260 days for a day-6 embryo. Choose "IVF transfer" and the calculator does it for you.
My scan gave a different due date. Which one is right?
The scan date is used when it differs from your period date by more than 5 to 21 days, depending on how far along you were at the scan (ACOG). Choose "A scan" and add your period date to see which one counts.
Will a later scan change my due date?
Not one set by a scan before 14 weeks. Early scans are the most accurate, so later scans don't change that date.
Why am I already "2 weeks pregnant" at conception?
Pregnancy is counted from the first day of your last period, about 2 weeks before conception, because that date is usually known and conception isn't.
How many babies are born on their due date?
Only about 4 in 100. Most babies arrive between 37 and 42 weeks.
What happens if I go past my due date?
In many countries you're offered induction from 41 weeks, so your baby is born by 42 weeks. If you wait, you'll usually be offered extra checks on your baby.
Is my data saved?
No. Everything is worked out in your browser and nothing is stored or sent.