In female twins, there is a likelihood that both will get the condition, especially if they are identical. (nicolejardim.com)
There are stories of my great grandmother putting a fox tail down the front of her dress trying to wean six year old female twins. (crunchydomesticgoddess.com)
More than 1,000 healthy female twins participated in the study, a lot of whom had no arthritis symptoms. (ahealthblog.com)