1. A meta-analysis of the route of administration of luteal phase support in assisted reproductive technology: vaginal versus intramuscular progesterone 
Paul W. Zarutskie, M.D., James A. Phillips, Dr.PH. 
Fertility and Sterility 
Volume 92, Issue 1, Pages (July 2009)
DOI: /j.fertnstert
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Intramuscular versus vaginal P administration: clinical pregnancy per ET.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Intramuscular versus vaginal P administration: ongoing pregnancy per ET.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions

4. Figure 3
Intramuscular versus vaginal P administration: miscarriage per clinical pregnancy.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions