1. A prospective, randomized, double-blinded study of assisted hatching in women younger than 38 years undergoing in vitro fertilization 
Andrea R. Hagemann, M.D., Susan E. Lanzendorf, Ph.D., Emily S. Jungheim, M.D., Aimee S. Chang, M.D., Valerie S. Ratts, M.D., Randall R. Odem, M.D. 
Fertility and Sterility 
Volume 93, Issue 2, Pages (January 2010)
DOI: /j.fertnstert
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Patient flowchart. Subjects were randomized to undergo or not undergo assisted hatching of all embryos. Patients who elected to undergo a subsequent IVF cycle were crossed over to the opposite arm.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Relationship between ZP thickness and clinical pregnancy. IVF cycles for which subjects' mean ZP thicknesses were available were tabulated according to their outcome (clinical pregnancy achieved or not achieved).
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions