Original Research Tag I ve added the tag due to a few lines in the article First the WP LEAD his exact role in the discovery of Trisomy 21 is considered controversial see the controversy section below is not cited I added a citation needed tag before I renamed my account but it s been removed in spite of WP LEADCITE and WP MINREF requiring an inline citation if it is challenged This has not happened As well as As of today the Website of the Lejeune foundation describes the discovery as the sole work of Lejeune In July 1958 as he was studying chromosomes linked to Down syndrome he discovered the existence of an additional chromosome on the 21st pair which is taking a side contrary to WP NPOV among other things contributed to me adding this tag As well I ve added the undue weight tag to the controversy section due to the source used RenewAmerica com per WP QUESTIONABLE