I'm not sure where you got that information but that's quite untrue and you've misinterpreted that study; KS doesn't result in a high risk pregnancy - its actually the maternal age. You have a higher chance of having a baby with KS the older the mother is and a higher maternal age is associated with higher risk hence why there is that correlation.TRIGGER WARNING: ABORTION, PRE -TERM BIRTH.
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Doctors actually would recommend termination for KS or any significant chromosomal abnormality. Upon doing some research over 50% of people decide to terminate, as these children have a very high risk of life long issues both physically and intellectually. Not going to put my opinion on that as it can be a sensitive and triggering topic.
Also following through with the pregnancy of diagnosed KS does infact classify that pregnancy as 'high risk'. Most predominantly - pre term birth. Here is a good study on it if anyone wants to read. https://pubmed.ncbi.nlm.nih.gov/27318449/
I'm not one to jump to Sarahs defense, but if it is infact KS, she is not lying about anything she has said in regards to termination advice and high risk pregnancy.
This study here reports a low termination rate of just over 12%.
https://pubmed.ncbi.nlm.nih.gov/9856559/
And majority for individuals with KS don't get diagnosed until adolence and 50% of cases remain undiagnosed because it simply isn't that detectable in the vast majority of cases.