The Outerlight touched on this similarly in one of his latest videos. It had something to do with the vaccine having a spike protein call syncytinol 1. It's vital for the formation of the placenta. In studies with mice it showed the immune response attacked syncytinol 1 and destroyed the placenta if I remember right. If the vaccine immune response is against the spike protein we are training the body to attack syncytinol 1 which can lead to infertility in women of an unspecified duration.