Reversibility of Changes in Short-Term Hormone Therapy
When considering hormone replacement therapy (HRT), it's important to understand the timeline and reversibility of changes. In the short term, typically within the first 2-3 months, most changes are reversible. This includes initial breast development and other physical changes. As one user explains, "If we are talking about within a timeframe of 2-3 months, pretty much everything is reversible." – purplebshit source [citation:c4bab9d0-0dcc-4907-999d-c575920db21b]. This period allows individuals to explore HRT with the possibility of reversing changes if they decide it's not right for them.

Irreversible Changes with Long-Term Hormone Therapy
Long-term use of HRT can lead to irreversible changes, particularly in breast development and fertility. After the initial months, breast growth becomes permanent unless surgically altered. Fertility may also be affected, with the potential for permanent infertility. As another user notes, "Breast growth past a fairly early point is irreversible without surgery." – No_Summer620 source [citation:7c640922-eaa9-4660-990e-7b8cc6b8ab49]. It's crucial for individuals considering long-term HRT to weigh these potential permanent changes.

Impact on Fertility and Family Planning
For those uncertain about wanting children in the future, the impact of HRT on fertility is a significant consideration. While short-term use is less likely to affect fertility, long-term use can lead to permanent infertility. The advice is to approach HRT with the assumption that it could lead to permanent infertility. As shared by a user, "The recommended advice is if you want to have kids, act like going on HRT will permanently make you infertile." – purplebshit source [citation:c4bab9d0-0dcc-4907-999d-c575920db21b]. This perspective helps in making informed decisions about family planning.

Bone Structure and Other Physical Changes
In addition to breast development, HRT can influence bone structure, particularly in younger individuals. Starting HRT before the age of 25 may lead to changes in bone structure, such as wider hips, which are considered irreversible. A user highlights this by saying, "If you're under the age of 25, your bone structure will grow in a more feminine pattern." – spacesuitlady source [citation:1e99147b-ba1d-41b9-bf59-d51962ce5c28]. Understanding these potential changes is important for those considering HRT at a younger age.

Conclusion
Embarking on hormone replacement therapy is a deeply personal journey that involves weighing the potential for both reversible and irreversible changes. Short-term HRT offers a period of exploration with reversible effects, while long-term use can lead to permanent changes in breast development, fertility, and possibly bone structure. By understanding these aspects, individuals can make informed decisions that align with their personal goals and future plans. Remember, this journey is about finding what feels right for you, and there is support available every step of the way.