Does the menstrual cycle modulate how trustworthy a woman sounds? Evidence from sighted and blind participants

The attractiveness of a woman’s voice is affected by her menstrual cycle. We investigated whether the cycle also affects the perceived trustworthiness of a speaker, and whether the speech content plays a role. Because blind people have been found to possess superior voice processing capabilities, we also tested blind individuals.
We recorded women while they were uttering neutral sentences and sentences suggesting a context in which you want to get to know someone (affiliation context). Each woman was recorded twice, once during the fertile late follicular phase and once during the luteal phase. Recordings from both cycle phases were paired and independent participants were asked to choose the voice sample that sounded more trustworthy (Block 1) and more attractive (Block 2).
Blind and sighted individuals perceived the voices in a similar way. Voices were rated as being more trustworthy around ovulation (irrespective of content). Affiliation sentences sounded more attractive when recorded during the luteal phase whereas there was no preference for neutral sentences.