Calculate Due Date ((better)) -
Here is everything you need to know about how to calculate your due date, the science behind the methods, and why that date might change. 1. The Standard Method: Naegele’s Rule
It is very common for a doctor to "adjust" your due date during your second or third appointment. Don't worry—this usually isn't cause for alarm. Reasons include: calculate due date
If your cycle is 35 days instead of 28, you likely ovulated later than Naegele’s Rule assumes. Here is everything you need to know about
Determine the . Add seven days to that date. Subtract three months. Add one year. Example: If your last period started on May 1, 2024: Add 7 days = May 8, 2024 Subtract 3 months = February 8, 2024 Add 1 year = February 8, 2025 2. Using an Ultrasound (The "Gold Standard") Don't worry—this usually isn't cause for alarm
Most healthcare providers use to estimate a due date. This method assumes a standard 28-day menstrual cycle and that conception occurred on day 14. How to calculate it:
If you have irregular periods or can’t remember your last start date, a first-trimester ultrasound is the most accurate way to calculate a due date.