RT Journal Article SR Electronic T1 Regular exercise during pregnancy did not affect physical growth or mental development of infants JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 22 OP 22 DO 10.1136/ebn.2.1.22 VO 2 IS 1 YR 1999 UL http://ebn.bmj.com/content/2/1/22.abstract AB