In the Waiting Room of a Doctor's Office, the Staff

In the waiting room of a doctor's office, the staff are creating an educational display about varieties of birth control.What general categories of birth control will they want to outline?
_____ drugs that block gonad development
__X__ devices to prevent implantation
_____ hormones to close cervix
__X__ hormones to prevent ovulation
_____ hypothalamic implants
_____ nasal spray for males
__X__ sperm barriers
__X__ sperm destruction
__X__ surgical sterilization
__X__ abstinence