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. 2008 Oct 30;169(1):105–112. doi: 10.1093/aje/kwn287

Table 3.

Summary Data on Adherence to Use of the Fertility Monitor and Fertility Level Reached Among the 249 Women Who Had Any Fertility Monitor Data in the BioCycle Study, Buffalo, New York, 2005–2007

Cycle 1 Cycle 2
No. % No. %
Incomplete monitor dataa 14 5.6 37 16.0
No. of missed tests out of the first 10b
    0 120 48.2 98 42.2
    1–2 83 33.3 77 33.2
    3–4 23 9.2 27 11.6
    5–10 22 8.8 18 7.8
    Unknownc 1 0.4 12 5.2
Estrone-3-glucuronide leveld
    High 215 86.4 195 84.1
    No high 30 12.1 33 14.2
    Unknowne 4 1.6 4 1.7
Lutenizing hormone level
    Peak 189 75.9 180 77.6
    No peak 49 19.7 29 12.5
    Unknowne 11 4.4 23 9.9
Clinic visit on peak day among women who reached peak
    Yes 142 75.1 148 82.2
    No 47 24.9 32 17.8
No. of missed tests out of first 10b among women with no peakf
    0 24 40.0 15 35.7
    1–2 19 31.7 12 28.6
    3–4 5 8.3 5 11.9
    5–10 12 20.0 10 23.8
    Unknownc 0 10
Maximum serum progesterone below 5.0 ng/mL among women with no peakf
    <5.0 ng/mL 21 35.0 8 15.4
    ≥5.0 ng/mL 39 65.0 44 84.6
Most likely reason for not reaching peak among women with no peakf
    Missed test 10 16.7 12 23.1
    Monitor data available only before peak 5 8.3 12 23.1
    Test stick reading error 7 11.7 10 19.2
    Long cycle 8 13.3 1 1.9
    Normal cycle length but late luteinizing hormone peak 2 3.3 1 1.9
    Early luteinizing hormone surge 4 6.7 1 1.9
    Possible low luteinizing hormone surge, serum progesterone ≥5.0 ng/mL 13 21.7 11 21.2
    Unlikely ever peaked 11 18.3 4 7.7
a

Data are incomplete if the woman did not bring her monitor in to have the data downloaded at the end of the testing period. Some of these women brought in their monitors after 10 tests were requested and reached high or peak fertility even though their monitor data were incomplete.

b

Ten tests were requested of all women (except one woman in cycle 1 whose next period started before 10 tests could be requested).

c

“Unknown” includes women whose monitor data are incomplete, and therefore it is unknown how many of the first 10 tests were missed.

d

Only includes women who achieved high fertility prior to the peak (the monitor automatically assigns a value of high fertility the day after the last peak day regardless of the estrone-3-glucuronide level; these women were not counted as high in this analysis).

e

“Unknown” includes women who did not reach high or peak fertility in the recorded data but who had incomplete monitor data downloaded. It does not include women with complete recorded monitor data who missed tests.

f

Includes 11 women for cycle 1 and 13 women for cycle 2 who had complete data for the first 10 tests and no observed peak but who had incomplete data for the final 10 requested tests.