New findings from the survey are now available to read on the Lancet's website.
You can also (updated June 2014) that illustrate what we've found out.
Here's a taster of our latest results.
More findings will be published in the coming months in medical and academic journals. We'll keep updating this website as more results become available.
We'd like to thank everyone who gave up their time to part in a Natsal interview. If you have any questions about Natsal please get in touch.
For information or advice about sexual health please see the organisations listed under Support & helplines.