Ok pelvic anatomy 101
The "hips" are formed by the fusion of three bones. The ileum, the Ischium and the Pubis.
Between the two pubis bones there is a medial secondary cartilaginous joint called the pubic symphysis. The bony iliac crests which are lateral and superior to the pelvic opening are what you think of as hips, however the true hip is actually much lower and is formed by the femoral trochanter.
In males the action of testosterone causes the bones to ossify thicken and become heavier. In women the bones remain unfused for slightly longer, and lacking the action of testosterone they stay more juvenile in their weight. The pelvic opening becomes wider too. However contrary to popular belief this is not a dimorphic structure.
There are in facts four types of hip bone Gynecoid, Platypoid, Anthropoid, and android. It is true that women tend towards the gynecoid end and men towards the android – however the reality is that a lot of women, possibly even the majority do NOT have those wide hips you all seem to crave.
In terms of what you can do, in reality nothing, other than looking around you and realizing that probably half the women you see don't have them either...
In theory if you broke the pubic symphysis, repeatedly and held the two parts apart while they re ossified then you could widen the gap – but a.) it would be bloody painful and b.) as any pregnant woman who has had pubic Symphysis disfunction will tell you, you wouldn't be able to walk.
This is precisely what happens to some unfortunate women in later stages of gravidity. Their pubic symphysis dislocates under the influence of progesterone and Relaxin – which can be crippling!
Bottom line - try to accept that transition can't be about having the "perfect" female body because sadly most women don't... and unfortunately this is just one of those things we can't fix.
