Pregnancy Due Date Week by Week
A pregnancy due date week by week calculator helps you understand where you are in pregnancy and what stage may come next. Pregnancy is commonly divided into weeks and trimesters.
How pregnancy weeks are counted
Pregnancy is usually counted from the first day of your last menstrual period. A full-term pregnancy is generally estimated around 40 weeks from LMP, although babies can arrive before or after the due date.
Pregnancy trimesters
First trimester: weeks 1 to 13. Second trimester: weeks 14 to 27. Third trimester: week 28 through birth.
Why week-by-week tracking helps
Week-by-week tracking can help you understand your current pregnancy stage, prepare for appointments, track symptoms, learn about fetal development, and estimate important pregnancy milestones.