Dog protects a pregnant woman.

Dog lovers, what do you think about this dog’s behavior? In this video, you see that the dog protects a pregnant woman. Is this a good parenting thing or is it a dangerous thing? Some say that it is great for their safety, that the dog would protect the baby at any cost. Others think that the dog could end up hurting the baby. I’d like an expert’s opinion on this one. Loyalty? Aggression?