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Track your pregnancy week by week. Enter your last menstrual period (LMP) date to find your current week, trimester, due date, and developmental milestones.
Pregnancy Week Calculation:
Weeks pregnant = Days since LMP / 7
Due Date = LMP + 280 days (40 weeks)
Trimester 1: Weeks 1-12 | Trimester 2: Weeks 13-27 | Trimester 3: Weeks 28-40
Pregnancy is counted from the first day of your last menstrual period (LMP), not from conception. This is because ovulation typically occurs about 2 weeks after LMP, and the exact date of conception is rarely known.
The first trimester spans weeks 1-12, the second trimester weeks 13-27, and the third trimester weeks 28-40. Each trimester brings different developmental milestones and physical changes.
A full-term pregnancy is 39-40 weeks. Babies born at 37-38 weeks are early-term, 39-40 weeks are full-term, 41 weeks are late-term, and 42 weeks or more are post-term.
Most healthcare providers recommend scheduling your first prenatal visit between 8-10 weeks of pregnancy. If you have risk factors or fertility treatments, you may be seen earlier.
Quickening is the first time you feel your baby move. First-time mothers typically feel it between 18-25 weeks. Women who have been pregnant before may feel it as early as 13-16 weeks.
Common prenatal tests include blood tests, urine tests, ultrasounds, nuchal translucency screening (11-14 weeks), quad screen (15-20 weeks), glucose tolerance test (24-28 weeks), and Group B strep test (35-37 weeks).