Plato in his symposium suggests organically two human beings were contained in one body, with four legs and two heads. So happy and powerful were these beings they challenged Zeus who cut them in half, which lead to them spending their entire life searching for their other half.
It has been discovered that 50% of pregnancies start off as twins, but one of the foetuses dies and is either absorbed into the body of the other twin while still in the womb or stillborn. This might be twin flames being in the womb together for a short time.
To find your twin flame stick a photo of yourself between two mirrors and hold it as you chant:
Zeus bring me my twin flame,
Let my other half be with me again.
Bring us together,
And part us never.
We are one love.