BTW, it’s around 13.5 percent but regardless it’s not 80% (that’s a lie)
Sure, if you only measure after 6 weeks.
For women of reproductive age, losses between implantation and clinical recognition are approximately 10–25%. Loss from implantation to birth is approximately one third [39, 46, 48, 49].
A recent re-analysis [39] of data from three studies [46, 48, 49] concluded that, in normal healthy women, 10–40% is a plausible range for pre-implantation embryo loss and overall pregnancy loss from fertilisation to birth is approximately 40–60%.
I think any warp travel at all was damaging, and lowering warp speeds was the compromise to slow down the damage they were doing but did not completely eliminate it