to investigate the role of brain catecholamine ( ca ) activity in the mechanisms related to physiological ovulatory function , we used high-performance liquid chromatography with electrochemical detector to measure the levels of urinary dopamine ( da ) , norepinephrine ( ne ) , epinephrine ( e ) , vanillylmandelic acid ( vma ) , homovanillic acid ( hva ) , 3,4-dihydroxyphenylacetic acid ( dopac ) , and total 3-methoxy-4-hydroxy-phenylglycol ( mhpg ) in a group of 12 normal women during both the early follicular and pre-ovulatory phases of the menstrual cycle .
C0007412
catecholamine
C0013030
dopamine