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Median (IQR) serum hormone levels and cycle length, BioCycle Study, 2005–2007.
| Cycle stage | n | Median | Percentile |
||
|---|---|---|---|---|---|
| 25th | 75th | ||||
| FSH (mIU/ml) | Early follicular phase | 249 | 6.3 | 5.3 | 7.8 |
| Estradiol (pg/ml) | Early follicular phase | 249 | 32.0 | 25.0 | 43.0 |
| LH (ng/ml) | Ovulatory window | 213 | 31.6 | 18.9 | 42.8 |
| Progesterone (ng/ml) | Mid-luteal phase | 217 | 10.1 | 7.0 | 12.4 |
| Cycle length (days) | 247 | 28 | 26 | 31 | |
IQR, interquartile range.
