Serum concentrations of oestradiol and progesterone during the menstrual cycle, pregnancy and with oral contraceptive pill (OCP) use
| Serum oestradiol pg·mL−1 | Serum progesterone ng·mL−1 | |
| Menstruation | 30–50 | 0.1–0.7 |
| Follicular phase | 30–400 | 0.1–0.7 |
| Ovulation | 100–700 | 0.1–0.7 |
| Luteal phase | 60–150 | 2–25 |
| Pregnancy (singleton; peak level)# | 1300–7200 | 65–290 |
| OCP (monophasic at steady state)¶ | 47–100 | 3.3–90 |
| Men | 14–54 | 0.1–1.0 |
#: during pregnancy, oestrogen and progesterone levels rise steadily throughout the trimesters; ranges provided in table represent peak levels documented in the third trimester. ¶: ranges of serum oestradiol and progesterone reflect steady-state serum concentrations achieved after multiple months of use with monophasic OCP from products with the lowest to the highest oestradiol/progesterone concentration.