1. The role of steroid hormone supplementation in non–assisted reproductive technology treatments for unexplained infertility 
Alexander M. Quaas, M.D., Ph.D., Karl R. Hansen, M.D., Ph.D. 
Fertility and Sterility 
Volume 106, Issue 7, Pages (December 2016)
DOI: /j.fertnstert
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Luteal-phase progesterone trajectory according to degree of ovarian stimulation.
Adapted from (21), with permission.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Forrest plot of clinical pregnancy rates with and without supplemental progesterone in subgroup analysis based on method of ovulation induction with the use of (A) gonadotropins, (B) clomiphene citrate, and (C) clomiphene citrate and gonadotropins combined.
Reprinted from (36), with permission.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions