Question 1

How accurate is the due date?

Accepted Answer

Only about 5% of babies arrive on the exact due date. Delivery between 37 and 42 weeks is normal — the due date is a midpoint estimate.

Question 2

What if my cycle is irregular?

Accepted Answer

Naegele's rule assumes a 28-day cycle. With irregular cycles, a first-trimester ultrasound dates the pregnancy more accurately — follow your doctor's assessment.

Question 3

Are the baby size and weight figures measured?

Accepted Answer

They are average references per week (e.g. 'size of a banana') for education only; actual growth is measured by ultrasound.