Inconsistent sleep patterns (fewer than 3–4 hours of consecutive sleep). Alcohol consumption the night before. Illness or fever. Stress or travel across time zones. Conclusion
If a person remains in the high-temperature phase for more than 18 days without a drop, it is often the first physiological sign of pregnancy, as progesterone levels remain elevated to support the uterine lining. Practical Applications basal temperature
Sustained higher temperatures until the next period begins. Inconsistent sleep patterns (fewer than 3–4 hours of
Basal body temperature is a simple yet profound biological marker. It acts as a window into the endocrine system, providing tangible data on how hormones like progesterone influence the body’s internal environment. Whether used for family planning or general health monitoring, it remains one of the most accessible ways to track the rhythmic nature of human physiology. Stress or travel across time zones