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Table 2 Summary of the identified methods developed to determine basal LH levels, to detect the onset of the LH surge in the menstrual cycle

From: Comparison between the different methods developed for determining the onset of the LH surge in urine during the human menstrual cycle

Method number Method Starting reference day Additional baseline days Percentage surge detection (exact day) Percentage surge detection (±1 day)
1 Fixed days Cycle day 5 Cycle days 5–8 44.5 52.0
2 Fixed days Cycle day 5 Cycle days 5–9 48.4 58.7
3 Fixed days Cycle day 6 Cycle days 6–9 48.0 56.7
4 Fixed days Cycle day 6 Cycle days 6–10 52.8 63.8
5 LH peak Day 3 prior to peak Plus preceding 4 days 63.4 87.4
6 LH peak Day 3 prior to peak Plus preceding 5 days 65.4 88.2
7 LH peak Day 4 prior to peak Plus preceding 4 days 70.5 90.2
8 LH peak Day 4 prior to peak Plus preceding 5 days 68.5 90.6
9 LH peak Day 5 prior to peak Plus preceding 4 days 66.9 81.9
10 LH peak Day 5 prior to peak Plus preceding 5 days 64.6 79.9
11 LH peak Day 6 prior to peak Plus preceding 4 days 59.1 73.6
12 LH peak Day 6 prior to peak Plus preceding 5 days 60.2 73.2
13 Estimated LH surge Day 1 prior to estimated surge Plus preceding 4 days 78.4 95.7
14 Estimated LH surge Day 1 prior to estimated surge Plus preceding 5 days 76.4 94.5
15 Estimated LH surge Day 2 prior to estimated surge Plus preceding 4 days 74.4 97.2
16 Estimated LH surge Day 2 prior to estimated surge Plus preceding 5 days 75.2 97.6