As nouns the difference between capulin and copulin
is that capulin is the ) while copulin is (biochemistry) any of a class of aliphatic acids that are found in vaginal fluids and used to signal ovulation.
copulin
English
Noun
(
en noun)
(biochemistry) Any of a class of aliphatic acids that are found in vaginal fluids and used to signal ovulation.