Risk of preterm birth by maternal age at first and second pregnancy and race/ethnicity.

Baer RJ, Yang J, Berghella V, Chambers CD, Coker TR, Kuppermann M, Oltman SP, Rand L, Ryckman KK, Muglia LJ, Chung PJ, Jelliffe-Pawlowski LL. Risk of preterm birth by maternal age at first and second pregnancy and race/ethnicity. J Perinat Med. 2018 Jul 26; 46(5):539-546.

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Paul Chung

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