Those two can cause birth defects, if not, syphilis DOES cause insanity and death if not treated.
These test have never tested for positive/negative blood types nor inherited diseases.
You are wrong, doctors DO test blood types for that reason. I know that for a fact from about medical professionals who told me so DIRECTLY.
Paul - I don't remember a blood test for marriage in Maryland. Life insurance, yes, but I really don't remember the blood test to get the marriage license.
Randolph Churchill had syphilis. He died from it. I'm not certain as to when he was infected ( but he DID have during most, if not all of his marriage to Jenny!); however, none of his children were born with it, nor with any defects.
Either your doctor friends are lying through their teeth to you, or you are lying through your teeth! The blood tests done before one is allowed to obtain a marriage license, is NOT done to detect anything other than syphilis and gonorrhea and in some states, one or the other disease is no longer tested for at all.
I'm married, my husband and I took the blood test almost 39 years ago. My daughter is married, she and her husband took the test almost 6 years ago. Everyone, but you, knows what these test comprise.
Some people, who have familial inherited diseases running rampant in their backgrounds, sometimes have battery of tests done, before they try to have a family, but NOT ever in order to obtain a marriage license.