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 daughter was one of those babies, and Mackenzie's Mission is Rachael's beautiful and heartwarming account of Mackenzie's life, child loss, and a journey through IVF.

Determined that other couples should not go through the same heartbreak, Rachael and Jonathan are now champions for genetic testing.

This is a story of triumph over adversity, the strength that can be found in kindness and the power of one couple to effect positive change in the world.