
In the past, many U.S. states required blood tests for couples to obtain a marriage license. These tests were historically used to detect venereal diseases, particularly syphilis, which was a major public health concern in the early 20th century. However, mandatory pre-wedding blood tests have now been abolished in all 50 states. Montana was the last state to repeal this requirement in 2019, marking the end of pre-wedding blood tests as a legal requirement in the USA. While blood tests are no longer mandatory, some states may still recommend or provide information about voluntary testing for certain diseases.
| Characteristics | Values |
|---|---|
| Number of states that require pre-wedding blood tests | 0 |
| States that previously required pre-wedding blood tests | Montana, Mississippi, Alabama, North Dakota, Oregon, Wisconsin, Indiana, Michigan, New Jersey, Oklahoma, Vermont, Connecticut, Massachusetts, New York, Rhode Island, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Vermont, Virginia, Washington, Wisconsin |
| Reasons for blood tests | Syphilis, gonorrhea, rubella, sickle-cell anemia, HIV, tuberculosis, genetic disorders |
| Alternative to blood tests | Brochures or pamphlets with information about inherited and sexually transmitted diseases |
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What You'll Learn

Blood tests for marriage licenses in the USA
In the past, many U.S. states mandated blood tests for applicants for marriage licenses. These tests were historically used to detect venereal diseases, such as syphilis, gonorrhoea, and rubella, as well as genetic disorders like sickle-cell anaemia. The requirement for these tests stemmed from the early 20th century, with the aim of improving public health and preventing the spread of disease, particularly syphilis, which was relatively widespread and associated with serious health complications.
However, as of 2019, all 50 U.S. states have abolished the requirement for blood tests as a mandatory part of the marriage license application process. Montana was the last state to repeal this requirement, removing the mandate that women be screened for rubella before marriage. While New York requires Black and Latino applicants to take a blood test for sickle cell anaemia, the result of the test does not impact the ability to obtain a marriage license.
Today, the requirements for obtaining a marriage license vary across states. While a marriage license is necessary in most states, some, like Alabama, only require a filled-out marriage certificate form. The process may also involve waiting periods, the submission of identification documents, and other specific conditions. Some states offer discounts on license fees or waive waiting periods if couples complete premarital education courses.
Instead of mandatory blood tests, some states now require applicants to read informative pamphlets about inherited and sexually transmitted diseases, as well as how to get tested for these conditions.
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Reasons for blood tests before marriage
Blood tests were once a common requirement for couples seeking to marry in the United States. As of 2019, however, blood tests are no longer required in any US state. Here are some reasons why blood tests were previously mandated before marriage:
Public Health and Disease Prevention
The most common reason for pre-marriage blood tests was to detect the presence of sexually transmitted infections (STIs), particularly syphilis. Syphilis was relatively widespread in the first half of the twentieth century, with an estimated prevalence of over 10% among Americans during their lifetime. Since syphilis could be transmitted from mother to child and cause birth defects, premarital blood tests were seen as a beneficial public health measure. The tests aimed to inform potential spouses of the risk of contracting the disease and reduce the chances of congenital syphilis.
Eugenics and "Racial Improvement"
The pre-marriage blood tests were also influenced by the eugenics movement of the time. The idea of "racial improvement" through positive eugenics, such as marrying a healthy individual, led to the implementation of blood tests as a way to ensure the fitness of spouses and promote a healthier nation. This reasoning was tied to prohibitions on interracial marriage, reflecting the discriminatory beliefs of the era.
Genetic Disorders and Birth Defects
In addition to STI screening, blood tests were sometimes used to detect genetic disorders, such as sickle cell anemia, or other conditions like rubella. The goal was to minimise the risk of genetic diseases or birth defects in the couple's offspring. However, unlike STI testing, genetic testing for consanguinity was generally not mandated due to its high cost and complexity.
Legal Requirements and Social Acceptance
The pre-marriage blood tests were mandated by laws passed in various US states, with a wave of effective laws requiring blood tests for both partners enacted between 1935 and 1950. These laws were extremely popular with the American public, with surveys showing high approval rates for premarital blood tests to check for venereal diseases. However, over time, the focus shifted from mandatory testing to providing information and voluntary testing, with some states requiring applicants to read brochures about inherited and sexually transmitted diseases instead of undergoing blood tests.
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History of pre-wedding blood tests in the USA
In the United States, the history of pre-wedding blood tests dates back to the early 20th century, when several states enacted laws requiring medical examinations for one or both parties before marriage. The primary focus was on detecting syphilis, a widespread venereal disease that could cause birth defects if transmitted from mother to child. However, other diseases such as gonorrhoea and rubella were also sometimes targeted. These laws were influenced by the public health campaigns of Surgeon General Thomas Parran, who aimed to reduce syphilis rates and increase public awareness about the disease.
By the 1930s, rising syphilis rates had reached crisis levels, and the taboo nature of the disease made it challenging to address. Parran's nationwide campaign utilised posters, films, cartoons, and even stamps to educate the public about venereal diseases. This campaign, along with the support of the American eugenics movement, led to the spread of premarital blood testing requirements across the country. Connecticut was the first state to implement such a law in 1935, and by 1954, all but eight states required premarital blood tests.
The blood tests were often mandated alongside prohibitions on interracial marriage, serving as a means of "racial improvement" in the eyes of proponents. Additionally, the tests were not always effective in identifying infected individuals, and couples sometimes chose to marry in states without mandates or forgo marriage altogether. The requirement for blood tests before marriage was gradually repealed by states, with Montana being the last state to abolish it in 2019. This repeal marked the end of pre-wedding blood tests as a requirement for marriage licenses in all 50 US states.
While mandatory pre-wedding blood tests are no longer required, some states may still encourage applicants for marriage licenses to read informational brochures or pamphlets covering inherited and sexually transmitted diseases, as well as testing options. This shift towards education and voluntary testing reflects a recognition of individual freedom and medical advancements that have reduced the need for mandatory blood tests.
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Alternatives to blood tests
As of 2019, pre-wedding blood tests are no longer a requirement in any US state. However, some states have alternative requirements for couples applying for a marriage license.
- Some states require applicants to read a brochure or pamphlet that includes information about inherited and sexually transmitted diseases, as well as how to get tested for those diseases.
- In the past, some states required male applicants for a marriage license to submit a medical certificate stating that they were free of venereal disease.
- Some states, such as New York, require that Black and Latino applicants for marriage licenses take a blood test for sickle cell anemia. However, the law allows for religious exemptions, and the results of the test do not affect the ability to get married.
- In the past, some states, such as Alabama, North Dakota, Oregon, and Wisconsin, had laws forbidding people with venereal diseases from marrying, but there were no measures in place to enforce this.
- Beginning in the 1980s, some national and subnational governments have considered implementing mandatory HIV testing prior to marriage.
It is important to note that the requirements for marriage licenses vary from state to state and may change over time. Couples planning to get married should check the current requirements for the state in which they plan to marry.
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States that have abolished blood tests
In the early 20th century, several US states passed laws requiring 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, rubella, and sickle-cell anemia were also tested for. These tests were often justified as a means of promoting public health and "racial improvement" through eugenics.
However, by 2019, all 50 US states had abolished pre-wedding blood tests as a requirement for obtaining a marriage license. Montana was the last state to do so, removing the mandate that women be screened for rubella before obtaining a marriage license. Prior to 2019, Montana had allowed brides to opt out of the blood test by signing an acknowledgment of the pregnancy risks associated with rubella.
Before the widespread abolition of blood tests, couples would sometimes choose to marry in states without such mandates, and the requirements were found to discourage marriage without significantly improving public health. In some cases, couples would incur significant costs for unnecessary medical procedures.
Today, while blood tests are no longer required, some states may still provide information about inherited and sexually transmitted diseases, as well as resources for testing and treatment.
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Frequently asked questions
No, as of 2019, pre-wedding blood tests are no longer a requirement in any US state. Montana was the last state to repeal its mandatory blood testing requirement.
Yes, pre-wedding blood tests were once a widespread requirement in the USA. By 1954, 42 states required premarital blood tests, primarily to screen for syphilis. Other diseases that were screened included gonorrhoea, rubella, tuberculosis, and HIV.
Pre-wedding blood tests were abolished because they were not cost-effective given the low prevalence of syphilis.



































