Sorry to disagree on this Vagifem can increase the size of existing fibroids and should be used with care if you do have them.
All you have to do is google this or ask your Doctor. It is stated on the leaflet. Use with caution.
If your fibroid is very small then it probably won't cause so much of a problem but if large then could make uncomfortable symptoms worse.
When you a have a little "alien" fibroid benign as they almost always are, (they also can calcify and dissolve naturally but I think this is rare, and some can be cancerous)) you don't want to fuel it, well I didn't, I was taking Red clover herb before mine was diagnosed ( it was diagnosed by accident) and my GP said that could have made it bigger.
Some fibroids cause no symptoms others do, there are different types and can grow inside and outside of the womb.
If you are diagnosed with fibroids its best to find out as much as you can about them and the make your choices.
Just be aware that any kind of estrogen your own, natural, oral or topical including Vagifem can fuel them.
They don't really know what causes fibrroids but the do know what makes them grow.