The exact cause for fibroids is not exactly pinpointed. It is suspected that a combination of things such as genetics and over-production of estrogen and other hormones could be the cause. It is possible that HGH injections may have played a role in your development of fibroids but there's no research that proves that the hgh was the actual cause. What we do know is that the combination of hormonal and genetic factors are the causes of fibroid development.
Good Luck with your surgery and please keep us updated!