Table 2.
Hormone Concentrations in Premenopausal Women during Phases of the Menstrual Cycle*
| follicular phasea days 3–9 |
ovulatory phaseb days 10–16 |
luteal phase c days 17–23 |
late luteal/menses d days 24–28 |
|
|---|---|---|---|---|
| Estradiol (pg/mL) | 48 ±14 | 118 ±22 | 121 ±25 | 95 ±14 |
| Progesterone (ng/mL) | 1.3 ±1.2 | 2.0 ±1.1 | 8.5 ±1.7 | 6.1 ±1.3 |
| Luteinizing hormone (IU/mL) | 2.2 ±1.1 | 7.2 ±1.2 | 3.6 ±1.2 | 3.1 ±1.2 |
*
Estimate of the mean ±1.96 standard errors (provides an approximate 95% confidence interval). Estimates were obtained from a linear mixed-effects model for data from 39 premenopausal women.
a
Follicular phase was defined by low progesterone and estradiol and rising LH; estimate of the mean is for day 6.
b
Ovulatory phase was defined by low progesterone, high estradiol, high LH; estimate of the mean is for day 14.
c
Luteal phase was defined as high progesterone, high estradiol, and falling LH; estimate of the mean is for day 20.5.
d
Late luteal/menses phase was defined by falling progesterone and estradiol and minimum LH; estimate of the mean is for day 26.5.