Griswold v. Connecticut was the U.S. supreme court decision that overturned laws banning contraception – at least, for married couples. It wasn’t the first SCOTUS decision to mention the concept of privacy, but it was a major one.
Research:

SYMHC Classics: Swill Milk
39:22

Behind the Scenes Minis: Mary, Beulah, Baby Alive
33:26

Beulah Louise Henry
39:37