Abnormal is a responsive term, it can't be defined in isolation, it can only be defined as a relative value after "normal" has been defined.
Fine, abnormal is something you don't experience most of the time, my quantitative measure of normality is whether a condition is experienced for >50% of your adult life, BOOM most women are not pregnant most of of the time, it's abnormal to be pregnant, therefore pregnancy is a disease.
Fine, abnormal is something you don't experience most of the time, my quantitative measure of normality is whether a condition is experienced for >50% of your adult life, BOOM most women are not pregnant most of of the time, it's abnormal to be pregnant, therefore pregnancy is a disease.