Afternoon all! Dr. William Hansel asked me to contribute the following literature reference to the ongoing discussion regarding PGF2a and subsequent luteal function: Hansen TR, Randel RD, Segerson EC, Rutter LM, Harms PG. Journal of Animal Science 1987; 65:524-533. Dr. Hansel also indicates that there is at least one other paper on this subject which also found CL abnormalities after PGF2a administration; however, he was unable to recall the authors' names. Bob