00520naa#a2200181#i#450# EN\INFRA-M\bibl\5537 20250123232417.4 2075-4094 20150706b2015####ek#y0engy0150####ca RUS RU The structure and incidence of preterm birth in nulliparous women Journal article Moscow INFRA-M Academic Publishing LLC. 2015 0 с. Journal article local Kuzibaeva R. Khadartseva K. zh-szf.ru