Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector5282810.17816/kazmj52828MiscellaneousZondek-Aschheim's reactionDanilovI.info@eco-vector.com13081935318-9111911190112202001122020Copyright © 2020, Danilov I.2020<p>The authors proved that there is no histidine in the urine of pregnant animals, and the Zondek-Aschheim's reaction is also negative.</p>Kazan Medical archiveКазанский медицинский архив