This evidence exists. What my theory does is to prepare an interpretation, based on this evidence, which can be scientifically tested. The solar cycle effects the geomagnetic field. The geomagnetic field affects life on Earth in certain observed ways. The particular influences appear to correlate with the planetary posotions.
Resonance is the phenomenom by which the fetus is phase locked to specific cycles.
To put this in more specific terms, my theory proposes that the planets Jupiter, Saturn, Uranus and Neptune control the direction of the convective motions within the Sun, wich generate the solar magnetic field. They do so because they play the major role in moving the sun about the common center of mass of the solar system. Thus the planets play a role in the modulation of Earth's magnetic field by the solar wind. I am also proposing that the tidal tug of the planets on the hot gases trapped within our magnetosphere will, because of resonance, lock some of the vibrations of the Earth's field in step with the planetary movements. The resulting fluctuations of Earth's field are picked up by the nervous system of the fetus, which acts like an antenna, and these sychronise the internal biological clocks of the fetus which control the moment of birth.