Mm.

And so having someone on hormonal suppression, number one, it kind of helps to switch off the ovarian and the estrogenic activity that might help to progress endometriosis, but number two, it can help to prevent retrograde menstruation or at least reduce it.

And so that's where the period blood is going up the wrong way through the fallopian tubes.

So by keeping that lining nice and thin, we're reducing it going up through the wrong passage, I guess-

Tell us, yes

... people that say, "I came off the pill and now I'm infertile because of the pill." Um, whereas often it was, well, hang on, maybe you were put on the pill for a reason initially, whether it be irregular periods or painful periods because there was a condition there, and now that you've come off it, there is that condition still there that may be affecting your fertility that we can then manage.