The first step is to setup your device using the Garmin Connect App.

To download the Garmin Connect App and get more support, please click here - https://connect.garmin.com/start/ 

Next you can connect your Garmin to the Healthy Mummy app - https://www.healthymummy.com/how-to-find-all-the-new-features-in-new-healthy-mummy-app/#sync