Utter rot and absolute nonsense.

What cabbage was this obstetrician brought up under?

Like all these things, you have the absolute right to ask for the scientific evidence that backs up the statements your ob makes. If s/he is confident in their knowledge they will have no problem providing it to you and should do it with good grace, knowing that their client is trying to fully inform herself about her own body.

I think the stature reason given is suitable for formal complaint to be made.

Good luck with it all,

David