He says that while 70 % of medical complications during delivery are forseeable, about 30 % (such as amniotic embolisms or premature detachment of the placenta) come up unexpectedly, and if an emergency occurs during an at-home birth, given traffic congestion these days it would be difficult to ensure that the mother could get to the hospital in time.
他指出，雖然有七成的生產意外可以事先預知，但仍有三成左右的狀況是在產程中臨時發生的，例如胎盤早期剝離、羊水栓塞等等。在家生產一旦遇到狀況，以目前的交通狀況，要緊急送醫恐怕仍有困難。