Feeling tired during ovulation can be common, especially if you engage in strenuous exercise or drink water frequently. However, the condition can also be caused by other factors, such as physical illness or medication side effects.

Tiredness during ovulation may be related to the following factors:

1. Physical strain: If you experience strenuous exercise or heavy fluid intake during this period, your body may feel exhausted.

2. Hormone changes: During a woman’s menstrual cycle, hormonal changes can cause physical fatigue. During ovulation, female hormone levels increase, which can cause physical fatigue.

3. Illness: Certain illnesses, such as anemia or thyroid problems, may cause you to feel tired during this period.

4. Medication Side Effects: Certain medications may cause you to feel tired during this period, especially those that affect the nervous system.

If you feel tired during ovulation, first make sure it's just a normal physiological phenomenon. If you feel extremely tired for a long time, you may want to talk to your doctor about other health problems. If you're unsure of the cause, you may also consider seeking advice from your doctor or nutritionist.