Size of baby's head

Cat
So I had my follow up OB after my 20 week scan. It's a boy! 💙💙
She said everything is going great, no abnormalities but that his head is measuring large. He is in the 95th percentile for head circumference. She said its knowledge to ensure I keep because the probability of needed a c-section might be higher as the baby's head may not fit through the birth canal. 
Yikes!! Has this happened to anyone before??