Cao, Chang, O’Brien KO. Pregnancy and Iron Homeostasis; An Update. Nutr Rev 2013; 71(1):35–51
O’Brien KO, Donangelo CM, Ritchie LC, Gildengorin G, Abrams SA, King JC. Impact of calcium intake and serum 1,25(OH)2D on rate of bone calcium deposition across pregnancy and the early postpartum period. Am J Clin Nutr. 2012; 96(1):64-72.
Young BE, McNanley TJ, Cooper EM, McIntyre AW, Witter F, Harris ZL, O’Brien KO. Maternal Vitamin D Status and Calcium Intake Interact to Impact Fetal Skeletal Growth In-Utero in Pregnant Adolescents. Am J Clin Nutr 2012; 95(5):1103-12
Young MF, Griffin I, Pressman E, McIntyre A, Cooper E, McNanley T, Harris L, Westerman M, O'Brien KO. Maternal Hepcidin is Associated with Placental Transfer of Iron Derived from Dietary Heme and Non-heme Sources. J Nutr; 2012; 142(1):33-39.
Young BE, McNanley T, Cooper B, McIntyre A, Witter F, Harris ZL, O'Brien KO. Vitamin D Insufficiency is Prevalent and Vitamin D is Inversely Associated with PTH and Calcitriol in Pregnant Adolescents. J Bone and Min Res 2011; Sep 28. Doi:10.1002/jbmr.526. [Epub ahead of print]
Essley BV, McNanley T, Cooper EM, McIntyre AW, Witter F, Harris ZL, O’Brien KO. Osteoprotegerin differs by race and is related to infant birth weight z-score in pregnant adolescents. J Developmental Origins of Health and Disease 2011; 2(5):272-9.
Jaacks LM, Young MF, Essley BV, McNanley TJ, Cooper EM, Pressman EK, McIntyre AW, Orlando MS, Abkowitz JL, Guillet R, O'Brien KO. Expression of the Heme Transporter, Feline Leukemia Virus Subgroup C Receptor (FLVCR), is Related to Maternal Iron Status in Pregnant Adolescents. J Nutr; 2011 Jul 141(7):1267-72.
Young MF, Griffin I, Pressman E, McIntyre A, Cooper E, McNanley T, Harris L, Westerman M, O'Brien KO. Utilization of iron from an animal-based iron source is greater than that of ferrous sulfate in pregnant and non-pregnant women. J Nutr 2010; 140:2162-6.
Young MF, Pressman E, Foehr M, McNanley T, Cooper E, Guillet R, Orlando M, McIntyre A, Lafond J, O'Brien KO. Impact of Maternal Iron Status on Placental Transferrin Receptor Expression. Placenta 2010; Nov;31(11):1010-4. Epub 2010 Sep 15.
Thacher TD, Obadofin MO, O’Brien KO, Abrams SA. The effect of vitamin D2 and vitamin D3 on intestinal calcium absorption in Nigerian Children with rickets. J Clin Endo Metab 2009; 94(9):3314-21.
Young MF, Glahn RP, Inglis J, Olbina G, Westerman M, O’Brien KO. Serum Hepcidin is Associated with Iron Absorption in Healthy Young Women. Am J Clin Nutr; 2009; 89(2): 533-8.
Atkinson SA, McCabe GP, Weaver CM, Abrams SA, O’Brien KO. Are current calcium recommendations higher than needed to achieve optimal peak bone mass? The controversy. J Nutr 2008; 138:1182-6.
O'Brien KO, Donangelo CM, Zapata CL, Abrams SA, Spencer EM, King JC. Bone calcium turnover during pregnancy and lactation in women with low calcium diets is associated with calcium intake and circulating insulin-like growth factor 1 concentrations. Am J Clin Nutr 2006;83(2):317-323.
O’Brien KO. Maternal and Fetal Partitioning During Pregnancy: Whose Needs Predominate? Nutrition Today; 2005; 40(3):130-137.
Smith SM, Wastney ME, O'Brien KO, Morukov VB, Larina IM, Abrams SA, Davis-Street JE, Oganov V, Shackelford LC. Bone markers, calcium metabolism, and calcium kinetics during extended-duration space flight on the Mir Space Station. J Bone Miner Res 2005;20(2):208-218.
O’Brien KO, Schulman Nathanson M, Mancini J, Witter FR. Enhanced calcium absorption does not prevent bone loss during pregnancy in adolescents. Am J Clin Nutr 2003;78(6):1188-1193.
Schulze KJ, O’Brien KO, Germain-Lee EL, Baer D, Leonard A, Rosenstein BJ. Endogenous Fecal Losses of Calcium Compromise Calcium Balance in Pancreatic Insufficient Girls with Cystic Fibrosis. J Pediatrics 2003;143:765-771.
O’Brien KO, Zavaleta, N, Abrams SA, Caulfield LE. Maternal Iron Status Influences Iron Transfer to the Fetus During the Third Trimester of Pregnancy. Am J Clin Nutr; 2003; 77:924-30.