Frequently Asked Questions
Which date must I use/enter to calculate the leaps?
Last Updated 11 months ago
To calculate the leaps you have to enter the due date. Also with preemies and twins. The timing of the mental development of a baby is linked to the age since conception and not to the age since birth. Therefore, to know when your baby is making a leap, you have to fill in the due date, and not the date of birth. Look at it this way: the brain of a baby that is born three weeks early is not as far developed as the brain of a full term baby. The brain develops, in and outside the womb. This is why we calculate with the due date.