Electromagnetism/Radiation on the island. Kills and cures?

Many thanks to Tilly and batttie for thoughts that have been very helpful in coming to this theory

We all know that women have been unable to have children successfully on the island, that they carry their baby then during childbirth, both mother and infant die. We know all this was happening before the swan imploded, but what about now it has gone? Could it be a possibility that the electromagnetism from the Swan caused this? We know that women cannot have x-rays while pregnant unless they are well protected, but mostly it is advised not to have one. We also know that women are advised to not have radiotherapy for cancer treatment while pregnant. But what would these treatments do to harm both mother and child?

Tilly pointed out that during radiotherapy in cancer treatment, the body's immune system is lowered, so could this mean that radiation/electromagnetism on the island has reduced the mothers immune system so much over the space of 9 months, that the body itself is treating the fetus as a foreign object? Or perhaps when the baby is born, its immune system is also so low that it dies at the time of birth? And as the mothers immune system is so low and birth is a traumatic experience as it is, her body just gives up. This could explain why Claire didn't die when giving birth to Aaron. She had only been exposed for a few weeks, rather than a full 9 months as the other mothers had been.

We know that Ben had a tumor on his spine and if radiation/electromagnetism was such a problem, surely his tumor would have been treated? But my answer to this would be that his tumor was just to aggressive for the radiation to possibly treat it. We know that not all cancer can be treated in such a way. This may explain Rose being cured also.