title: 3-hour urinary radioimmunoassay for luteinising hormone to detect onset of preovulatory LH surge.
mesh_terms: D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood / Q000652:urine*; D010061:Ovulation Detection / Q000379:methods*; D011863:Radioimmunoassay; D013997:Time Factors
chemical_list: D007986:Luteinizing Hormone