Luteal or follicular (5)
I believe the answer is:
phase
(Other definitions for phase that I've seen before include "Shape (anag.)" , "Aspect of moon" , "Period within process" , "stage in process of development" , "Shape into stage" .)
I believe the answer is:
phase
(Other definitions for phase that I've seen before include "Shape (anag.)" , "Aspect of moon" , "Period within process" , "stage in process of development" , "Shape into stage" .)