Pregnancy a Disease????

So apparently Barnes and Noble Bookstore considers pregnancy a disease. Shame on them! They have pregnancy books listed under the disease section of their bookstore. A friend of mine went there today and saw this and was offended as am I. Pregnancy is a blessing and miracle from God and should never, under any circumstances be considered a disease! I have sent them an email expressing my opinion about this. I will follow up with a response from them when I receive it.