We can call these phases: the beginning, the middle and the end.
It is estimated that some 7-7.5% of the world’s population falls into the LGBT community (gay, Trans or non-binary). Within this range of figures, some 1.5-2% are said to represent Transgender people, both MtF and FtM. Therefore, there are far more Trans women in the world than you think! There are Trans women in every country and in every strata of society. In every profession and in every race. Being Transgender is unpredictable, although there is some evidence of it being common in family lineage.