What sort of hormone replacement therapy are you on exactly? Is it a birth control pill (combo estrogen and progestin) or do you take a separate patch for estrogen and cream for progesterone?

If you've gone into ovarian failure, it's unlikely that your ovaries are producing the crucial follicle stimulating hormone, which is what would indicate that you are fertile. I am guessing that your doctor has you on hormones to protect your feminine characteristics and protect your heart and bones.

Give your doctor's office a call and ask specifically if your hrt will also keep your fertile. If you can't get a hold of your doctor, you might want to try the pharmacy where you got your prescriptions filled (pharmacists are a great source of info on all sorts of topics like this).

Let us know how it turns out. Take care.