Mackenzie's Mission'A true love story' Mia Freedman, founder of Mamamia Rachael and Jonathan were thrilled to welcome their baby Mackenzie into the world and to start their new lives as parents. Little did they know that in a few months they would be tested to endurance and beyond. Like many other couples starting a family, Rachael and Jonathan had no idea they were both carriers for a genetic disease, and that 1 in 20 babies are affected by genetic birth defects. Their