Calculadora de Fecha de Parto

How to calculate due date?

The due date is calculated using Naegele's rule, which assumes pregnancy lasts 280 days (40 weeks) from the first day of the last menstrual period. This pattern assumes a regular 28-day cycle and ovulation exactly at mid-cycle (day 14). Most babies are born between 37 and 42 weeks of pregnancy, meaning the due date is only approximate - only about 5% of babies are born exactly on their due date. Remember that the due date may vary depending on your menstrual cycle length.

Pregnancy stages

• First trimester (1-12 weeks) - period of intense organ development, highest miscarriage risk, typical symptoms include nausea and fatigue
• Second trimester (13-26 weeks) - "honeymoon" phase of pregnancy, more energy, visible belly, can learn baby's sex
• Third trimester (27-40 weeks) - preparation for labor, baby gains weight, Braxton Hicks contractions may begin

When to contact doctor?

Regular prenatal visits are crucial for maternal and fetal health. If concerning symptoms occur such as severe abdominal pain, bleeding, sudden decrease in fetal movements, intense headaches, or swelling, contact your doctor immediately. By 36 weeks of pregnancy, visits should be weekly. It's also wise to pack your hospital bag in advance in case of early labor.

Preparing for labor

In the final weeks of pregnancy, focus on preparing your body for labor. Regular moderate activity (walking, prenatal yoga) helps prepare muscles. Relaxation and breathing techniques help manage stress. Learn about labor symptoms (Braxton Hicks, baby "dropping", mucus plug) and discuss your birth plan with your doctor. Remember, every pregnancy is different - there's no single "right" way to prepare.