system
Given the following post, respond as if you're commenting on Reddit:
human
Do hormones in toddler boys and girls really differ much?

As a parent I have heard people repeatedly make comments about how boys are so much harder to raise because of their hormones. I’m not talking about pubescent kids, people make this kind of comment about my 3 year old and even my 1 year old. I always assume this is just sexist thinking but is there a big difference between biological boys and girls at such a young age? Thanks.
gpt
There's a phenomenon known as "mini-puberty" where sex hormones increase temporarily early in life.  It's far more pronounced in boys than it is in girls.  This increase for boys starts at about 6 months and peaks around 2 years before dropping off to baseline by age 6. At 2 years old, testosterone levels for boys is almost half of what it would be at puberty.

Girls also have a mini-puberty, but the spike in estrogen is far lower at only about a 10th of what it would be during puberty.

It should also be noted that babies are flooded with sex hormones during gestation, with girls getting far more estrogen before birth than they do at puberty and boys getting almost as much as during puberty.