1. Balloon catheter vs. cervical vacuum cup for hysterosalpingography: a prospective, randomized, single-blinded study 
Giuseppe Ricci, M.D., Pierpaolo Guastalla, M.D., Lydie Ammar, M.D., Gina Cervi, M.S.N., Silvia Guarnieri, M.D., Andrea Sartore, M.D. 
Fertility and Sterility 
Volume 87, Issue 6, Pages (June 2007)
DOI: /j.fertnstert
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

2. FIGURE 1 The cervical vacuum cup device.
Ricci. Comparison of two nontraumatic devices for HSG. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

3. FIGURE 2 The balloon catheter device.
Ricci. Comparison of two nontraumatic devices for HSG. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

4. FIGURE 3 Flow of participants through each stage of the trial.
Ricci. Comparison of two nontraumatic devices for HSG. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions