Sangomas believe that a persistent physical ailment is often a manifestation of a spiritual upset and they first need to address that, then they are guided by the ancestors on what the physical sickness is and how best to treat it, using traditional medicine.
The first 12 weeks can be pretty rough, what with the feeling of sickness and lethargy, and towards the end it can be tough just because of the weight of the baby.
He is a keen evangelist, criticising what he has called "the spiritual sickness of a self-referential Church" - and calling for the Church to "get out into the street".
"What you need in any modern employer in the 21st century is a joint approach towards sickness absence where you combine preventing abuse on the one hand and fairness on the other, " Mr Dromey told the BBC.