How I Met Your Father

This week's program reveals the improbable saga of the making of a very modern family.

It's a narrative that 'starts at the end - and ends at the beginning'.

Advertising executive Aminah Hart lost two baby boys as a result of a genetic disorder passed from mother to son.

Anonymous sperm donation and IVF offered a last chance to have a healthy child.

Of five possible donors one stood out, a cattle breeder from Phillip Island who, crucially, described himself as 'happy and healthy'.

When blue eyed blonde baby Leila arrived two years ago, events took a most unexpected turn...