1. True or false? Primary amenorrhea is defined as failure of girls to begin menstruation by age 14 if they have not gone through puberty or by 16 two years after puberty. 2. True or false?...

1. True or false? Primary amenorrhea is defined as failure of girls to begin menstruation by age 14 if they have not gone through puberty or by 16 two years after puberty.

2. True or false? Leiomyosarcoma arises directly from a preexisting leiomyoma.