Pregnancy Calendar

Enter or select your LMP or your estimated due date, depending on what the tool asks for—both anchor the same 40-week timeline when consistent. Use week navigation or tabs to jump between trimesters, milestones, and suggested appointment reminders shown in the widget.

For a clean printout, use your browser's print dialog after hiding non-essential chrome if needed. The calendar section is meant to stay readable on paper; the sections below stay on screen only.

Obstetric dating usually starts from the first day of the last menstrual period, not conception. Naegele's ruleestimates due date as LMP plus 280 days (9 calendar months + 7 days in the common formulation). That implies gestational age runs about two weeks ahead of embryonic age from conception, which is why "week 4" on a calendar often lines up with very early pregnancy.

Trimesters are conventional bands—first through week 12, second through 27, third from 28 to delivery—not rigid biological switches.

Cycles longer or shorter than 28 days, uncertain LMP recall, or late ovulation shift real gestational age. Crown–rump length in the first trimester is often used to revise EDD when it disagrees with LMP by more than a small margin. After that window, ultrasound-based dating is less precise for changing the due date.

Guidelines have grouped late preterm, early term, full term, and post-term for counseling about induction and newborn readiness. Many sources treat roughly 37–41+6 weeksas a span where term labels apply, with nuances your hospital team will use. This calendar's milestone text is educational, not a substitute for their timing.

No. It is a planning and education aid. Screening schedules, medication timing, and labor decisions belong with your obstetric provider, midwife, or family physician who knows your history, risk factors, and local protocols.

• Prenatal scheduling: Roughly align anatomy scan and glucose screen windows with time off requests—then confirm exact dates with your clinic.
• Partner or family: Share a printed week view so everyone understands trimester language your care team uses.
• Leave planning: Pair calendar weeks with HR policies; employers often want EDD documentation rather than app output alone.