I always get one around 30 then after if the baby has positive blood

They give me mine at 35weeks, so somewhere around there. They will give you 2 one during the pregnancy and one after the birth. My midwife didn’t give me second one I need after I give birth to my son.

They *shouldn't* until after the baby is delivered. If there's a risk they give it around 28w I believe then again after delivery