• Rev Assoc Med Bras (1992) · Nov 2021

    Late pregnancy: impact on prematurity and newborn's weight.

    • Lia Keiko Sousa Shimamura, Denise Leite Maia Monteiro, Célia Regina da Silva, Flávio Eduardo Frony Morgado, Flávio Monteiro de Souza, and RodriguesNádia Cristina PinheiroNCPhttp://orcid.org/0000-0002-2613-5283Universidade do Estado do Rio de Janeiro - Rio de Janeiro (RJ), Brazil.Escola Nacional de Saúde Pública Sérgio Arouca - Rio de Janeiro (RJ), Brazil.Fundação Oswaldo Cruz - Rio de Janei.
    • Universidade do Estado do Rio de Janeiro - Rio de Janeiro (RJ), Brazil.
    • Rev Assoc Med Bras (1992). 2021 Nov 1; 67 (11): 1550-1557.

    ObjectiveThis study aimed to evaluate the frequency of late pregnancies in Brazil, the age-specific fertility rate (ASFR) in the regions, the rate of prematurity, and the rate of low birth weight (LBW) and their association with advanced maternal age compared with 20-34-year-old women.MethodsThis was a cross-sectional study conducted by searching the Information System on Live Births (Sistema de Informações Sobre Nascidos Vivos [SINASC]). Data from 1995 to 2018 were collected, and pregnant women were divided into three categories based on their age range: 35-39, 40-44, and ≥45 years. The study calculated the frequency of deliveries of mothers of advanced age in Brazil, the ASFR, and the rates of prematurity and LBW in each group.ConclusionsThe frequency of deliveries and ASFR ≥35 years increased between 1995 and 2018. The chances of prematurity and LBW were higher with increased maternal age.

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