1. Role of metformin for ovulation induction in infertile patients with polycystic ovary syndrome (PCOS): a guideline 
Alan Penzias, M.D., Kristin Bendikson, M.D., Samantha Butts, M.D., M.S.C.E., Christos Coutifaris, M.D., Ph.D., Tommaso Falcone, M.D., Gregory Fossum, M.D., Susan Gitlin, Ph.D., Clarisa Gracia, M.D., M.S.C.E., Karl Hansen, M.D., Ph.D., Andrew La Barbera, Ph.D., Jennifer Mersereau, M.D., Randall Odem, M.D., Richard Paulson, M.D., Samantha Pfeifer, M.D., Margareta Pisarska, M.D., Robert Rebar, M.D., Richard Reindollar, M.D., Mitchell Rosen, M.D., Jay Sandlow, M.D., Michael Vernon, Ph.D. Alan Penzias, M.D., Kristin Bendikson, M.D., Samantha Butts, M.D., M.S.C.E., Christos Coutifaris, M.D., Ph.D., Tommaso Falcone, M.D., Gregory Fossum, M.D., Susan Gitlin, Ph.D., Clarisa Gracia, M.D., M.S.C.E., Karl Hansen, M.D., Ph.D., Andrew La Barbera, Ph.D., Jennifer Mersereau, M.D., Randall Odem, M.D., Richard Paulson, M.D., Samantha Pfeifer, M.D., Margareta Pisarska, M.D., Robert Rebar, M.D., Richard Reindollar, M.D., Mitchell Rosen, M.D., Jay Sandlow, M.D., Michael Vernon, Ph.D. 
Fertility and Sterility 
Volume 108, Issue 3, Pages (September 2017)
DOI: /j.fertnstert
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Comparison of live-birth rates with clomiphene citrate versus metformin with clomiphene citrate (28).
(Reprinted by permission of John Wiley & Sons, Inc. The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.)
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Clinical pregnancy rates and live-birth rates with various therapies in clomiphene citrate–resistant women (45).
(Reprinted by permission of Oxford University Press. Moll 2007 Oxford University Press on behalf of the European Society of Human Reproduction and Embryology.)
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions

4. Figure 2
Clinical pregnancy rates and live-birth rates with various therapies in clomiphene citrate–resistant women (45).
(Reprinted by permission of Oxford University Press. Moll 2007 Oxford University Press on behalf of the European Society of Human Reproduction and Embryology.)
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions

5. Figure 3
(A) Pregnancy and (B) live-birth rates in lean women with polycystic ovary syndrome treated with metformin vs clomiphene citrate (75).
(Reprinted by permission of Oxford University Press. Misso 2012 Oxford University Press on behalf of the European Society of Human Reproduction and Embryology.)
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions