Martin JA, Osterman MJ, Kirmeyer SE, et al: Measuring gestational age in vital statistics data: transitioning to the obstetric estimate. Natl Vital Stat Rep 64(5):1, 2015
Matthews TJ, MacDorman MF, Thoma ME: Infant mortality statistics from the 2013 period linked birth/infant death data set. Natl Vital Stat Rep 64(9):1, 2015
Maymon E, Romero R, Pacora P, et al: Evidence for the participation of interstitial collagenase (matrix metalloproteinase 1) in preterm premature rupture of membranes. Am J Obstet Gynecol 183(4):914,t2000
McCall CA, Grimes DA, Drapkin Lyerly A: "Therapeutic" bed rest in pregnancy unethical and unsupported by data. Obstet GynecoIt12l:1305, 2013
McElrath TF, Allred E, Leviton A: Prolonged latency after pre term premature rupture of membranes: an evaluation of histologic condition and intracranial ultrasonic abnormality in the neonate born at <28 weeks of gestation. Am J Obstet Gynecol 189:794,t2003
McElrath TF, Norwitz ER, Lieberman ES, et al: Perinatal outcome after preterm premature rupture of membranes with in situ cervical cerclage. Am J Obstet GynecoIt187:t1t147, 2002 McEvoy C, Schilling 0, Segel S, et al: Improved respiratory compliance in preterm infants ater a single rescue course of antenatal steroids: a randomized trial. Am J Obstet GynecoI202(6):544.e1, 2010
McGregor JA, Jackson GM, Lachelin Gc, et al: Salivary estriol as risk assessment for preterm labor: a prospective trial. Am J Obstet Gynecol 173: 1337, 1995
McIntire DO, Leveno KJ: Neonatal mortality and morbidity rates in later preterm births compared with births at term. Obstet Gynecol III:35, 2008 McManemy J, Cooke E, Amon E, et al: Recurrence risk for preterm delivery. Am J Obstet GynecoIt196(6):576.e1, 2007
McPherson JA, Rouse OJ, Grobman WA, et al: Association of duration of neuroprotective magnesium sulfate infusion with neonatal and maternal outcomes. Obstet GynecoIt124(4):749, 2014 Meis PJ, Klebanof M, Thom E, et al: Prevention of recurrent preterm delivery by 17alpha-hydroxyprogesterone caproate. N Engl J Med 348:2379, 2003 Meis PJ, Michielutte R, Peters TJ, et al: Factors associated with preterm birth in Cardif, Wales, I. Univariable and multivariable analysis. Am J Obstet Gynecol 173:590, 1995