[Biologic reaction for pregnancy with male frogs Rana ridibunda].
D000818:Animals; D001001:Anura; D001688:Biological Products; D005260:Female; D008297:Male; D011247:Pregnancy; D011258:Pregnancy Tests; D011895:Rana ridibunda; D011898:Ranidae
D001688:Biological Products
PREGNANCY TESTS
Biologicheskaia reaktsiia na beremennost' s samtsami liagushek Rana ridibunda.