Errechneter Geburtsterminrechner
Schätzen Sie Ihren Geburtstermin anhand Ihrer letzten Menstruationsperiode (LMP). Verwendet die Naegele-Regel: LMP + 280 Tage.
Voraussichtlicher Geburtstermin
Woche
Aktuelle Woche
w d
Verbleibende Tage
Trimester
Geschätzte Empfängnis
Dieser Rechner verwendet die Naegele-Regel (LMP + 280 Tage). Tatsächliche Geburtstermine können abweichen. Bitte konsultieren Sie Ihren Arzt für genaue Schätzungen.
Frequently Asked Questions
How is a pregnancy due date calculated?
The due date is calculated by adding 280 days (40 weeks) to the first day of the last menstrual period (LMP). This is known as Naegele's rule. Only about 5% of babies are born exactly on their due date; most arrive within two weeks before or after.
What are the three trimesters of pregnancy?
The first trimester spans weeks 1–12, the second trimester covers weeks 13–26, and the third trimester is weeks 27–40. Each trimester has distinct developmental milestones and different prenatal care recommendations.
How accurate is a due date calculator?
A due date based on LMP is an estimate. Only 4–5% of babies arrive on the exact due date. An ultrasound in the first trimester can provide a more accurate estimate, typically within 5–7 days. About 80% of babies are born between weeks 38 and 42.