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Table 4 Production of LH and regular hCG during non-gestational menstrual cycles [166].

From: New discoveries on the biology and detection of human chorionic gonadotropin

Number of valid non-gestational menstrual cycles 371 cycles
Timing of LH peak concentration during valid menstrual cycles mean ± SD) 14.6 ± 3.1 days
Number of urines tests 11,122
Length of menstrual cycle, start of bleeding to next start of bleeding 28.6 ± 3.8 days
Of valid cycles, the mean peak LH concentration ± SD 210 ± 161 mIU/ml
Number of positive daily hCG tests, 1 IU/L sensitivity, in valid menstrual cycles 371
Proportion of menstrual cycles with positive regular hCG test, 1 IU/L sensitivity 332 (89%) cycles
Cycles with positive regular hCG test, regular hCG mean ± SD 1.52 ± 0.91 mIU/ml
Cycles with positive hCG test, hCG range 1.0 – 9.3 mIU/ml
  1. hCG assay used is the Siemens Immulite hCG test with < 0.1% crossreactivity with LH. Standard deviation is abbreviated as SD.