Pregnancy week 13 and 14

From weeks 13 and 14, the baby starts to move and may hiccup, but the movements are often too small to be felt.

What’s happening to the mother?

At weeks 13 and 14, the uterus is the size of a grapefruit. It is common for you to gain weight during this period. Weight gain is usually one to four kilograms. Gestational nausea has usually subsided.

Development of the fetus

The baby’s organs continue to grow. Urine production gets underway, and nails are fully grown on fingers and toes. Thin hairs grow on the body of the baby which protect its skin. The baby starts to move and may hiccup, but the movements are often too small to be felt.

All nutrients are passed to the baby via the placenta. The length of the baby from head to buttocks is between 60 and 74 millimetres.

Feel life

Tips for pregnant women on how to monitor your baby’s movements. Information in Arabic, English, Norwegian, Polish, Somali, Spanish, Tigrinya and Urdu.

Zanzu

Information about pregnancy, childbirth and the postnatal period in Arabic, English, Farsi, French, Norwegian, Polish, Somali, Tigrinya and Turkish aimed at immigrants and others with a short period of residence in Norway.

Content provided by The Norwegian Directorate of Health

The Norwegian Directorate of Health. Pregnancy week 13 and 14. [Internet]. Oslo: The Norwegian Directorate of Health; updated Monday, March 7, 2022 [retrieved Thursday, October 16, 2025]. Available from: https://www.helsenorge.no/en/pregnancy-and-maternity-care-in-norway/pregnancy-week-by-week/pregnancy-weeks-13-and-17/

Last updated Monday, March 7, 2022