Is estrogel and progesterone dangerous if your mother died of uterine cancer ?

Not really: Only 2-3% of cancers have a genetic link, most are behavioral. Uterine or endometrial cancer, is usually due to unopposed estrogen. The "opposition" is progesterone. If they were dangerous, you would have been in trouble when you were menstrating as well, making both Estrogens and progesterone.

Probably not: Probably not but best to have a detailed conversation about your family history and other risk factors with your gynecologist.