Is the pre-marriage medical investigations must be done in your country?

Question

There are some medical laboratory tests made for those planning to marriage, it aims to prevent spread of hereditary, life threatening and STDs.

If it is a must in your country, please name these tests and for male and for female, and what added in case of relatives? And please also name your country.

Answer 1

California USA.  There are no mandatory tests.  

In the US this is an individual state matter and will vary from state to state.  There may be a few states that still require blood tests for a few specific STD's.  As far as I know none require any kind of genetic screening.

Answer 2

Those tests are all remnants of an old system; all they look for is syphilis.

I can't speak for every country in the world, but in the US, there are only a few states that haven't repealed those old laws (and most of the places that still have them are in the process of getting rid of them).  The laws date from times long before genetic testing; there is no possibility that they could have intended to test for genetic disorders.  These days, the tests are even more useless, because today you cannot be forced to reveal anything about your medical status to someone else, even if that someone else is the person you're going to marry.  There is at least one very antiquated law that used to test only the female, presumably on the grounds that it would be the female who would pass congenital syphilis to any children; I'm not sure if that one's still on the books in its jurisdiction, but that's even sillier.  It was never for relatives, just the couple.  A lot of places used to ask whether either party had any relatives who had to be institutionalized, though.  (Also antiquated, also silly.)

No state anywhere tests for HIV as a condition of marriage.  That seems to be a popular belief, but it just isn't true.

There are voluntary registries that certain cultural groups use to determine whether or not members of the community should marry--this has been notably successful amongst parts of the Jewish community in almost eliminating diseases like Tay-Sachs and cystic fibrosis.  This is NOT required, though, and it's anonymous; kids are tested at birth for carrier state and issued a number.  When they grow up and are ready to marry, both parties can call the registry and find out whether or not the marriage is "recommended."