Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector7840510.17816/kazmj78405MiscellaneousPathological and chemical changes in hyperemesis gravidarum. Drennan and Hicks (Berich. über d. ges. Gyn., Bd. X, H. 23)TimofeevA.info@eco-vector.com151119262211129512962008202120082021Copyright © 1926, Timofeev A.1926<p>By studying the ratio of ammonia nitrogen to its total amount in urine, or the so-called ammonia coefficient (A.-C.), the authors came to certain conclusions.</p>Kazan Medical archiveКазанский медицинский архив