Nub theory help🤔

November_mama • Engaged to my best friend💍Mommy to an Angel baby👶🏼💗loving life as a first time mom to a beautiful baby girl🌸

Trying to figure out the nub theory, and need some ladies help who know what they’re doing lol. Is this a good pic of the baby’s nub, and if so I’m guessing girl right?

Any help appreciated! Thanks!