Calculate due date and pregnancy week in Denmark

A due date calculator is one of the most important tools for pregnant women in Denmark. By knowing your due date, you can plan parental leave, prepare for birth, and follow your baby's development week by week.

How the due date is calculated in Denmark

In Denmark, pregnancy is counted from the first day of your last menstrual period, and a typical pregnancy lasts 40 weeks + 2 days (282 days). The due date can be calculated from: first day of last period (most common), cycle length, conception date, or early scan (week 7-13). Only 4-5% give birth on the actual due date.

Pregnancy weeks and trimesters

Pregnancy is divided into three trimesters: 1st (weeks 1-12), 2nd (weeks 13-27), and 3rd (weeks 28-40). The nuchal scan is typically done at weeks 11-14, and the anomaly scan at weeks 18-21.

Ovulation and fertility window

Ovulation typically occurs about 14 days before the next period. The fertility window is about 5-6 days wide.

Weight gain during pregnancy

Recommended weight gain depends on pre-pregnancy BMI. For normal weight (BMI 18.5-24.9), 11.5-16 kg is recommended.

Frequently Asked Questions

How do I calculate my due date in Denmark?

In Denmark, the due date is typically calculated as 40 weeks + 2 days (282 days) from the first day of your last menstrual period. If your cycle isn't exactly 28 days, the calculation is adjusted. The most accurate due date is set at the nuchal scan (weeks 11-14). You can use online calculators like Min-Mave.dk or Gravid.dk.

How many give birth on their due date?

Only 4-5% give birth on the actual due date. It's equally normal to give birth 3 weeks before or 2 weeks after the due date. Consider it a guideline rather than a precise appointment. Most births occur between weeks 37 and 42.

When is the nuchal scan in Denmark?

The nuchal scan is typically performed at weeks 11-14 of pregnancy. At this scan, the nuchal fold thickness is measured and the final due date may be adjusted. The anomaly scan is typically done at weeks 18-21. Both scans are offered free to all pregnant women in Denmark as part of the public healthcare system.

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