Are miscarriages ever induced by extraterrestrial manipulations? If so, what percentage do they account for?

Unfortunately, this is very much the case. More than half, approximately 60%, of miscarriages are a directly induced abortion through extraterrestrial technological manipulation, and that is certainly a travesty of major proportions. It is akin to the infanticide typically attributed to sudden infant death syndrome, but actually murder, as that is the intent, to end a life, and is in keeping with their broad program of reducing the human population through multiple strategies.