Hormones & Catamenial Epilepsy
Hormonal changes can affect seizure patterns in some people living with epilepsy. For many women and people who menstruate, seizures may become more frequent at specific points in the menstrual cycle.
This pattern of seizure activity related to the menstrual cycle is known as catamenial epilepsy. Understanding how hormones may influence seizures can help people better recognize patterns, track symptoms, and discuss treatment options with their healthcare team.
What is Catamenial Epilepsy?
Catamenial epilepsy refers to seizures that appear to be influenced by hormonal changes during the menstrual cycle. Some people notice that seizures increase before or during menstruation, around ovulation, or at other points in the cycle.
It is not always easy to recognize at first. Many people only begin to notice a pattern after tracking seizures and cycles together for several months.
How Hormones May Influence Seizures
Estrogen
Estrogen may increase brain excitability for some individuals, which may make seizures more likely at certain times.
Progesterone
Progesterone may have a calming effect on brain activity for some people. When progesterone drops, seizure risk may increase.
Hormone Cycle Timeline
This simplified timeline shows how seizure patterns may line up with different parts of the menstrual cycle for some people. Not everyone experiences the same pattern, but this can be a helpful starting point.
Common Catamenial Seizure Patterns
Perimenstrual Pattern
Seizures may increase around the start of menstruation when progesterone drops.
Periovulatory Pattern
Seizures may increase around ovulation when estrogen levels are higher.
Luteal Phase Pattern
Some seizure increases happen during the second half of the cycle when hormones fluctuate differently from month to month.
No Clear Pattern
Not everyone with epilepsy will experience a cycle-related seizure pattern. Tracking can still help rule this in or out.
Tracking Seizures and Menstrual Cycles
Keeping a record of both seizures and menstrual cycles can help identify patterns that may suggest catamenial epilepsy. Many neurologists recommend tracking information for several months before drawing conclusions.
Tracking may also help reveal other triggers such as stress, sleep disruption, illness, missed medication, or hormonal birth control changes.
Helpful things to track
- Date and time of seizures
- Type of seizure or symptoms experienced
- Menstrual cycle start dates
- Ovulation timing, if known
- Medication schedule or dose changes
- Sleep patterns and fatigue
- Stress levels or illness
- Hormonal birth control use
Catamenial Epilepsy Self-Check
A checklist cannot diagnose catamenial epilepsy, but it may help you decide whether it would be useful to talk with your doctor or neurologist about hormone-related seizure patterns.
- Seizures appear to happen more often at certain times of the month
- Seizures increase before or during menstruation
- Seizures increase around ovulation
- Cycle changes appear to affect seizure frequency
- Hormonal birth control seems to affect seizures
- There may be a pattern but it has not been tracked yet
- You have questions about how hormones may be influencing epilepsy
Diagnosis and Medical Follow-Up
Diagnosing catamenial epilepsy usually involves looking at seizure history, menstrual cycle timing, medication history, and symptom patterns over time. A neurologist may ask you to bring a seizure diary, cycle calendar, or notes about symptoms that happen at predictable points in the month.
The goal is not only to identify whether hormones may be involved, but also to rule out other possible seizure triggers or reasons for changing seizure control.
Treatment and Management Approaches
Treatment for catamenial epilepsy is individualized. For some people, better tracking and better understanding of their pattern may be the first step. For others, a neurologist may consider changes in medication timing, dose adjustments, or other strategies.
Possible approaches
- Reviewing anti-seizure medication timing
- Adjusting treatment during certain parts of the cycle
- Monitoring seizure trends more closely
- Discussing hormone-related strategies with specialists
Important reminder
Treatment decisions should always be made with medical guidance. Do not start, stop, or change seizure medication on your own.
Birth Control and Epilepsy
Hormonal birth control may interact with certain anti-seizure medications. Some medications may reduce contraceptive effectiveness, while some contraceptives may affect medication levels.
If you are considering starting, changing, or stopping birth control, it is important to discuss this with both your prescribing doctor and your neurologist so seizure control and contraceptive effectiveness can both be considered.
Perimenopause and Menopause
Hormonal changes later in life may also affect seizure patterns. Some people notice changes in seizure frequency during perimenopause or menopause, when hormone levels may fluctuate more significantly.
Sleep disruption, stress, mood changes, and medication changes during this stage of life may also affect seizure control.
When to Seek More Support
Reach out if
- Your seizures change suddenly
- You suspect a clear hormonal pattern
- Your cycle becomes irregular and seizures worsen
- You are considering hormonal birth control
- You feel unsure about what you are experiencing
Support matters
Questions about hormones and epilepsy can feel confusing or frustrating. Tracking patterns and talking with a knowledgeable care team can help.