Right before 15 weeks gestation, the nub seems exactly the same in all fetuses. But some tiny variations may very well be present which will help predict whether the nub is more prone to build into a penis or even a vulva. ' It's also typical to observe forked-formed nubs https://nubtheoryaccuracy22110.ja-blog.com/27138365/a-review-of-nub-theory-9-weeks