RH negative

Sophia
Hello "all" you RH negative ladies 😉
What kind of information have you received about this from your midwife? 
I was told I need to take anti-d immunogloubin injections at 3 different occasions before due date. Sounds a lot if I compare to what I've read online? Some women don't take any until after delivery (in case baby is RH positive)? /sophia Xx