Why can’t women get pregnant without the menstrual cycle? (2016)
I first wondered if OP means that first answer with the obscure and horrible programming analogy then I found the real answer by Suzanne Sadedine which is an amazing read.<p>That was the creepiest part:<p><i>Some fetal cells find their way through the placenta and into the mother&#x27;s bloodstream. They will grow in her blood and organs, and even in her brain, for the rest of her life, making her a genetic chimera</i><p>and this is a wonderful summary of evolution:<p><i>In other words, it&#x27;s just the kind of effect natural selection is renowned for: odd, hackish solutions that work to solve proximate problems</i>