| Functional Therapeutic Chemical Classification System | Early Pregnancy Ontology | Source |
|---|---|---|
| http://www.w3.org/2002/07/owl#Thing | http://www.w3.org/2002/07/owl#Thing | SAME_URI |
| http://www.semanticweb.org/ontologies/epo.owl#Levonorgestrel | http://www.drugbank.ca/drugs/DB00367 | LOOM |
| http://www.semanticweb.org/ontologies/epo.owl#OPPIO_p000004 | http://purl.obolibrary.org/obo/GO_0009566 | LOOM |
| http://www.semanticweb.org/ontologies/epo.owl#Progesterone | http://www.drugbank.ca/drugs/DB00396 | LOOM |
| http://www.semanticweb.org/ontologies/epo.owl#Estradiol | http://www.drugbank.ca/drugs/DB00783 | LOOM |