Women are usually most tired during two parts of the menstrual cycle due to hormonal fluctuations: the menstrual phase and the luteal phase. Here’s a detailed breakdown:

When Women Feel Most Tired During Their Cycle

1. Menstrual Phase (Days 1–5)

• Hormones: Low estrogen and progesterone

• Why you feel tired:

  • Blood loss can reduce iron levels, leading to fatigue

  • Uterine cramps and inflammation can drain energy

  • Hormonal drop affects mood and sleep quality

• Symptoms: Fatigue, low motivation, body aches

2. Luteal Phase (Days 15–28)

• Hormones: High progesterone and moderate estrogen, then a drop if no pregnancy occurs

• Why you feel tired:

  • Progesterone has a calming, sedative effect

  • PMS symptoms (bloating, mood swings, headaches) can disrupt sleep

  • Body temperature slightly rises, increasing energy expenditure

• Symptoms: Sleepiness, low energy, brain fog

3. Follicular Phase & Ovulation (Days 6–14)

• Hormones: Rising estrogen leading up to ovulation

• Energy levels: Usually higher

• Mood: More positive, alert, and social

• Reason: Estrogen boosts serotonin, dopamine, and overall energy

Summary