N.A. CHEREPANOV1, R.S. ZAMALEEVA2, L.I. MALTSEVA2, A.V. PHRIZINA1, V.K. LAZAREVA1, T.R. ZEPHIROVA2, M.E. ZHELEZOVA2 1Volzhsk Central City Hospital, 46 Sovetskaya St., Volzhsk, the Republic of Mari-El, Russian Federation, 425000 2Kazan State Medical Academy, 36 Butlerov St., Kazan, Russian Federation, 420012 Cherepanova N.A. ― Cand. Med. Sc., Head of the Maternity Department, tel. (83631) 6-37-73, e-mail: […]