Oviductal, not oviducal.
Both etymologically and in literal meaning the term "oviductal" is overwhelmingly preferable to "oviducal."
Smith
H M
HM
Department of Environmental, Population, and Organismic Biology, University of Colorado, Boulder 80309-0334.
Preston
M J
MJ
Jones
R E
RE
D000818:Animals; D005260:Female; D010057:Oviducts; D009626:Terminology as Topic