Premarital medical examination

Beginning in the early 20th century, a number of U.S. states passed laws mandating medical examinations for one or both parties before marriage. The most common requirement was a blood test for syphilis, though other diseases such as gonorrhea and rubella were sometimes also targeted. If a partner tested positive, they would generally be required to undergo treatment before they could receive a marriage license.

Such laws were once widespread in the United States, with all but eight states requiring premarital blood tests by 1954. Mandatory testing was also in effect in parts of Canada, and some European nations such as Sweden. Most of these laws were repealed by the late 20th or early 21st century.