Original version

BBC World Service Online

More or Less

Discussion & Talk

Factual: Arts, Culture & the Media

Tim Harford explains the numbers and statistics in the news and in life

Tim Harford explains the numbers and statistics in the news and in life.

BBC World Service schedule for American satellite radio and the Caribbean

BBC World Service Americas and the Caribbean

BBC World Service Australasia

BBC World Service East Asia

BBC World Service Europe and the Middle East

BBC World Service South Asia

BBC World Service

BBC World Service West and Central Africa Schedule

BBC World Service West and Central Africa

BBC World Service East and Southern Africa Schedule

BBC World Service East and Southern Africa

More or Less: Menstrual Syncing

Magazines & Reviews

Factual

two women shutterstock_193877501.jpg

02/09/2016 GMT

Menstrual Syncing

BBC World Service - More or Less, Menstrual Syncing

Do women’s periods start to synchronise if they spend time together?

It is a commonly held belief that if women spend enough time together, their bodies start to communicate through chemical signals, known as pheromones. Eventually the women’s bodies will start to menstruate at the same time. 

But where does this idea come from? And is it really true? We look at the evidence and wonder – could it be down to chance?

(Photo: Two women. Credit: Eugenio Marongiu/Shutterstock)

Accessibility links

Programme Index

More or Less

Menstrual Syncing

Genres

Formats

Brand

BBC World Service Online

About BBC World Service