1. The play of chance Fertility and Sterility
John Collins, M.D. 
Fertility and Sterility 
Volume 85, Issue 5, Pages (May 2006)
DOI: /j.fertnstert
Copyright © 2006 American Society for Reproductive Medicine Terms and Conditions

2. FIGURE 1
Randomized controlled trials of the effect of early luteal-phase acupuncture (ACU) (6, 7, 16). X axis: differences in estimated live birth rates (percent) with 95% confidence intervals (CI). Bubble point size is proportional to study weight (inverse of the variance). Heterogeneity Q = 0.374, (3 degrees of freedom), P=.94.
Collins. The play of chance. Fertil Steril 2006.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2006 American Society for Reproductive Medicine Terms and Conditions