I think they could be related to hormones. What makes me think this is that mine (partial seizures) occur roughly every month, and i've read lots of others that say theirs also occur monthly. I'm a man, but I notice lots of females posting about siesures like mine. I'm not the average tough-guy/aggro-male, I think I have a little more estrogen than most men; I believe in women's rights and don't feel like I have prove how big my package is. No brothers, only sisters, and a dominant mother.
I also think about how the first seizure I remember having happened when I was 15 years old (VERY pumped full of hormones at that time).
So yeah, I've been tracking them to see if there is any correlation to my hormonal cycles, (which being male I assume are related to ejaculation). Well there is a pattern for me that seems to indicate seizures happening at times when its been more than 3 days since an orgasm. For the past year 90% of the seizures happened when I went 4-5 days or more without an orgasm.
Or maybe my problem is Estrogen, and getting it from my foods?
I tend to consume Milk, and while I buy organic maybe its still screwing me?
Cheap plastic contains BPA, a chemical that enters the body and acts like estrogen.
I used to drink at least one 32 ounce Diet Pepsi from 7/11 everyday (in plastic cups), and then chew on the straw after it was gone. I would chew and chew on those things. Man, I was addicted to it!
Or maybe its artificial sweeteners? I've stopped consuming any artificial sweeteners. This year I went 67 days without a seizure. I felt great, But then they came back to their monthly ritual.
I'm still trying to figure out why I made it so long without one during that time; I stopped all diet foods (no nutrasweet, etc), avoided plastic whenever easily possible, I was riding my bike 4 days a week, and eating a lot of peanut butter every day, along with eating more fresh produce, and drinking more water. I also made sure I had an orgasm on regular basis-not a ton of them, but consistently

Maybe that helped?
When I was 15 (before the 1st seizure) I took some major steps to lose weight. The two main ones were; don't eat peanut butter EVER and start drinking diet soda. Eat cereal if you are hungry, with nonfat milk. This stuck with me through my twenties. I had blamed my weight problem on my daily peanut butter sandwich my mom packed for me since grade school. But maybe it helped me stay seizure free growing up? I haven't got a clue. I do think I had a siezure when I was very small, say 2 years old. But was so long ago, who knows.
I don't know if this will help you or not. I say keep a diary of these things and Good Luck!