Question for people with twins

Kaytlyn • 28. Happily married. PCOS. Mommy to 4 sweet babies JCJ 7/26/14 KRP 6/10/16 ARP 1/17/20 EMP 11/11/21 💙💙💙💜

There is an old wives tale that if your child has 2 swirls/crowns on their head your next pregnancy will be twins. Has anyone found this to be true? Lol