Looking to understand

Have you talked extensively to your child about this? is this gender identity something that your child has always seemed to identify with or has it been more abrupt and quickly changing? I am sure it would help to get counseling together to find out what your child thinks and feels and it would help them open up more probably, and maybe that would give insight that addresses some of your questions. Regarding actually fully transitioning surgically, infertility is almost sure. HRT alone wont necessarily create infertility, but in chronic use/therapy it definitely does increase the risk of infertility in a person born male as estrogen will eventually impair spermatogenesis after years of hormone therapy. It can be reversible the younger that you are as well.

Speaking from experience, my first question is if your child is seeing 1. Therapist and 2. a WPATH certified primary care physician. A qualified therapist who works specifically with the LGBTQIA community is incredibly helpful - for you child, and maybe for you as well. Some even specialize with family counseling as well. A WPATH certified primary care physician is essential if any body modification is in the planning, including HRT, as well as surgical procedures. Though some physical results are reversible, not all are (e.g., breast development typically remains). There are a number of private social media sites that are aimed a parents just like you. You might want to check some out. Finally, I can wholeheartedly recommend a book you and your child might find helpful: The Reflective Workbook for the Partners of Transgender People, by D. M. Maynard. My wife and I found it to be full of insights that helped us better understand the transition I'm going through. You sound like an ally; everyone needs an ally in transition. Be the best one you can be, dear.