Back to Definitions


Babies first stool. It begins to form in the gut between 12 and 16 weeks of pregnancy and is made up of what baby has ingested in utero, or what they have produced. This can include but is not limited to: amniotic fluid (definition link), lanugo (definition link), cells, water, and bile. It is very dark in colour and it is also very sticky. Your baby will be expected to pass meconium within the first 24 hours of life. In addition, up to 25% of babies beyond 34 weeks pass meconium whilst still in utero.

We would love you to join our community.

Receive a free Hospital Bag Checklist when you sign up to the newsletter

Please select one of the options below

/ /
/ /
We use cookies and similar technologies to enable services and functionality on our site and to understand your interaction with our service. By clicking on accept, you agree to our use of such technologies for marketing and analytics.