An interesting article regarding teacher qualifications. If you are so inclined to read it
Y’know, I think the most pertinent point about yoga teacher training is that the training course itself should never be sufficient in itself to let inexperienced “teachers” loose on students.
Teaching is a skill that is learnt in practice over time working under supervision. No teacher, especially a yoga teacher and god forbid a pre-natal yoga teacher, should be allowed to practise on students the day after finishing their training course!
Students come to classes expecting and trusting their teacher to be speaking from the voice of experience (not branded 
but real life).
Good article, thanks for posting!