| http://www.w3.org/ns/prov#value | - Polyclonal antibodies to progesterone are commercially available from many different sources including Research Diagnostics, Inc., Flanders, N.J., and are described in Humblot, F., et al. (1988) ???Pregnancy-specific protein B., progesterone concentrations and embryonic mortality during early pregnancy in dairy cows,??? Reprod.
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