title: [Actual value of biological reactions for diagnosis of pregnancy; the Mexican toad (Bufo valliceps Wiegmann) as reactive animal].
authors.forename: E
authors.initials: E
authors.lastname: AGUIRRE PEQUENO
mesh_terms: D000818:Animals; D002025:Bufonidae; D005260:Female; D011247:Pregnancy; D011258:Pregnancy Tests