The other comment has done a pretty great job of summarizing it, but the answer is essentially that it differs between people. I’ve just hit the 90 day mark with mine, taking only 2mg per day via the sublingual route. I am only just now getting some soreness behind my nipples that might indicate the start of permanent growth.

My personal rough timeline started as:

1 week:

• Skin was noticeably less oily
• Facial hair already began growing in a little bit slower/thinner
• Higher amounts of executive function

2 weeks:

• Core temperature dropped from a typical average 99.7 to average 96.9 (measured twice daily when I started feeling cold)
• Emotions started to feel bigger. More present. More significant, maybe.

3 Weeks

• Started noticing that I need to eat less to feel full. This was probably due to dieting, but I had already been dieting for a solid 3 months so it came as a surprise.
• Cried for the first time about something that happened years ago. Realized it feels like a wall has come down from between me and my emotions. I have stopped dissociating, and happiness feels more real than it ever has

6 Weeks

• Visible decrease in flaccid size of my genitalia (no erect changes)
• marked decrease in blood pressure
• my nipples are hard constantly, but no notable pain or growth

8 weeks

• Marked changes in sexual sensitivities
• Notably lower amounts of ejaculate
• Realize I haven’t yelled or been aggressive when frustrated in nearly a month at least
• My resting face has come to resemble more of a smile than a scowl … But that’s probably not a medical change :-)

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None of those are permanent changes, and talking with some other folks that seems to be a pretty common thread: Permanent changes are usually many months in, so unless you have a very specifically accelerated response to it, you shouldn’t have anything to worry about. if your specialist says you can try it out fearlessly, then you should listen to their advice.