To use the due date calculator, first click on the month (on the left side) when you last had a period. Then click on the day of the month (at the bottom of the page) that your period began. Your estimated due date will be where the 40 arrow points. Keep in mind that this is an estimate and you could deliver several weeks before that date or up to a couple of weeks afterwards.  Some fun milestones to remember: Around 4 weeks: Positive pregnancy test Around 5 weeks: Baby's heart is beating Around 8 weeks: All of the baby's body systems are present Around 10-12 weeks: The baby's heart is audible with a handheld doppler Around 17-20 weeks: First movement felt by mother Around 25-28 weeks: Others can feel the baby kick |