Measurement of serum LH during the proestrus critical period in rats exhibiting four- or five-day estrous cycles.
D000818:Animals; D004971:Estrus; D005260:Female; D007986:Luteinizing Hormone / Q000097:blood*; D010424:Pentobarbital / Q000494:pharmacology; D010507:Periodicity; D011247:Pregnancy; D011863:Radioimmunoassay; D051381:Rats
D007986:Luteinizing Hormone; D010424:Pentobarbital