How do you know if your child has a speech issue?

It can be difficult as a parent to know whether your child is meeting milestones at the right time, particularly when it comes to speech. Some children are just late starters and can take a while to utter their first word, while others seem like born broadcasters! So how do you know if you should wait or seek professional advice? Sarah and Mel share their experiences and the challenges around knowing what to do.See omnystudio.com/listener for privacy information.