RT Journal Article SR Electronic T1 Safety of metformin use during the first trimester. JF Canadian Family Physician JO Can Fam Physician FD The College of Family Physicians of Canada SP 1070 OP 1070 VO 51 IS 8 A1 Cameron J Gilbert A1 Gideon Koren YR 2005 UL http://www.cfp.ca/content/51/8/1070.abstract AB