User blog comment:IamJakuhoRaikoben/Chapter 376: Wendy vs. Ezel, Review./@comment-4718355-20140321203400/@comment-24066070-20140324182107

It's not like I was 100% serious or anything, but it would be awesome if that's the ability of his Curse. The Demons also created a Curse for Doriate which turned ppl into a child (I know the Curse just reduced their abilities and the victims turning into a child was a side-effect).

Erza's armours can negate fire, lightning and water, so why wouldn't Zeref have been able to create a Curse which targets children? Perhaps Zeref realized exceptionally talented kids could be born and Ezel served as a failure-proof means of preventing these kids from maturing and becoming a real threat.

There was also this power which sealed the abilities of women, so why wouldn't a child-sealing ability exist?