Hormones.

Female sex hormones are affecting on the information substances of cerebral brain, as serotonin. Many women's having a temporary tie with a cycle and on the menses stage or rare of ovary rupture are headaches raising attacks. And in 5 percents of  women's with headache are headaches tied by a time with menses cycle as mense migraine.

And headaches attack of menses display are longer and probably a mechanism of theirs display is hormone estrogen lowering in the blood as on the menses time, and after births.

And in the middle and last third of pregnancy are shortening migraines attacks and after birth's theirs frequently rising till an old quantity, but sometimes are worsening, but migraine also having in pregnancy as on the first third. Sometimes display migraine with aura, even before on the first time display migraine without an aura.

And taking for anti baby pills are leading to rising of headaches, if estrogen's quantities are high containing, as in pregnancy he cause a back effect, if this is so,thus remedy to change or prescribe an other.

And on climax or after his are migraines attacks are display on the different, and a level of heaviness  and frequently of same attacks are lowering ,and if attacks are often and rising,thus hormones using are must helping you, ask about this your gynecologist.