I got thinking: according to the DVD epilogue, the electromagnetism is why babies can't be born on the island and, in fact, that problem extended to the polar bears and other Dharma test animals.
So....if the electromagnetism is creating problems for pregnancies for animals as well, how did the wild boar have babies...or any other mammals on the island for that matter?
Anyone still think they weren't just making shit up as they went along?
People are really unfair to the producers. I'm sure there were tweaks made along the way to accomodate real world events (Ana Lucia and Libby dying right after the DUI arrests for example). And there were definitely tweaks made in response to fan reaction (Carlos and Nicky, the format of the last 3 years after the complaints year 3 was being padded etc).
I'm sure that the whole idea of the Smoke Monster, Locke, Jack, Adam and Eve, Jacob, probably even Desmond were there from the start and other little details came along the way. I do believe that the electromagnetism causing pregnancy issues was probably a bit of a background consequence of the "Incident" at the Swan station (which I'm sure was part of the plan). Just not every little detail mattered and when it came time to write the final season they scrapped certain unimportant answers because in the end it had no real bearing on the story.
Like the numbers. They left all the information to figure it out. In those podcasts a few years ago it was revealed that the numbers were the core mathematical equation of the universe. I don't think Jacob knew about them when he made his list, it was just an example of fate that the people who matched the core numbers were brought together.
Maybe boars are immune to magnetism because they were scottish.