Ozzie,
More and more couples are investigating and making informed decisions around the Vit K injection. Many are deciding against it.

None of my own babies have had VitK but it would be accurate to say that the large majority of babies do have it - kinda the "done thing" . However, like the syntocinon injection given to women as routine to "quickly" deliver the placenta it's routine use is being questioned by many.

As Ryn pointed out the risk of HDN is very low and minute in a normal vaginal delivery.

Good luck with your investigations and good on you for seeking out information and making informed choices...