Why would a female dog smell your breasts Can they sense pregnancy that i am unaware of?

Dogs have a heightened sense of smell and are able to detect a variety of scents, but there is no scientific evidence to suggest that they can sense pregnancy in women. While some female dogs may be drawn to the scent of a pregnant woman's breasts, this is likely due to a combination of factors such as sweat, hormones, and other changes that occur during pregnancy. It is not an indication that the dog is aware of the pregnancy or is able to predict it.