Fluctuations of estradiol during women's menstrual cycle: Influences on reactivity towards erotic stimuli in the late positive potential.

•Associations of LPP-amplitudes in reaction to erotic words with estradiol concentrations in free cycling women.•Estradiol concentrations correlate positively with LPP-amplitudes towards erotic words during follicular phase & ovulation.•Progesterone is not associated with the reactivity towards erotic words in the LPP.•During luteal phase, estradiol-concentrations are not associated with LPP-amplitudes towards erotic (vs. neutral) words.•Cycle phase is not associated with the reactivity towards erotic words in the LPP.