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Obstet Gynecol. 1997 Jul;90(1):63-7. doi: 10.1016/S0029-7844(97)00215-9.
The risk of preterm birth across generations.
Porter TF, Fraser AM, Hunter CY, Ward RH, Varner MW
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Obstet Gynecol. 1997 Jul;90(1):63-7. doi: 10.1016/S0029-7844(97)00215-9.
Porter TF, Fraser AM, Hunter CY, Ward RH, Varner MW