1. Prospective evaluation of luteal phase length and natural fertility
Natalie M. Crawford, M.D., David A. Pritchard, M.S., Amy H. Herring, Sc.D., Anne Z. Steiner, M.D., M.P.H. 
Fertility and Sterility 
Volume 107, Issue 3, Pages (March 2017)
DOI: /j.fertnstert
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1 Flow diagram of study enrollment. TTC = Time to Conceive.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2 Lengths (in days) of the luteal phase.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

4. Figure 3
Adjusted Kaplan-Meier curves according to short luteal phase in the first observed cycle.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions