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The article you link to literally says the cause is not known and does not mention any links to birth control...

> The exact cause of uterine fibroids is unclear. However, fibroids run in families and appear to be partly determined by hormone levels. Risk factors include obesity and eating red meat.

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Hormone levels are impacted by birth control, maybe that's the mechanism.

Reading comprehension fail; nowhere in my comment did I use the word 'cause'.

The hormones involved in hormonal birth control are growth factors. If you have uterine fibroids (or a fetus), the hormones help them grow.

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