Is it because she is a girl?

i dont think this is the case either, i have two girld and my second was a lot stronger right from a young baby than my first, they are now 4 and 6 years old and it is still the case, my eldest is the weaker one of the two still to this day and she has a smaller build even though she is taller than the younger sister

Each child develops at his or her own pace, which means they grow muscles at their own pace as well. It has nothing to do with gender. Each of my kids were different. 3 out of the 4 boys were walking around 9 or 10 months, but they didn't have perfect balance yet... they just walked and kept falling. My daughter, although she stood at the same time as her brothers, she wouldn't take her first steps until she was nearly 15 months old... and once she did start taking those steps, she never fell. It wasn't that she wasn't capable, she just didn't want to fall. Goes to show she was smarter than the boys, lol!

Not at all. Until puberty boys and girls are almost exactly the same. Even after that strength really isn't the issue. Girls develope lean muscle where as, boys develope bulkier muscle. She'll develope more muscle as she starts doing more on her own. My daughter is very strong at 3 years old. She can lift objects that are near her wieght. She's an extremely determined kid though. If she really wants something she'll figure out how to do it.

I don't think it really makes a difference. My son did everything early, but my daughter did things even sooner than he did. A little too early I think sometimes. Each kid is different and develops at different rates. I don't think gender has anything to do with it.

It is not good to compared children. The genders has alot to do with it as well and maybe you need to investigate this out more. Google is a good way of getting information.

Hi - I don't think being a boy or girl really matters when it comes to kids that are that young...each child develops differently. I think the gender start becoming a factor when the kids get older ...

Male structural design gives them greater upper body strength. Probably can notice this at even a young age. Overall strength?? Well, women do tend to outlive men.

I doubt it. The more likely reason is because every child is different. They grow and gain gross motor skills at their own pace. The same thing could be said about their strength level at different ages.

I think we all tend to think that way alot of times but I do not believe that is the total case either. I think they both can be strong at certain ages. I am not sure what makes the difference in some though.

I don't think that is the case either. When my nieces and nephews were young I saw the oppposite in some cases. My niece Micayla was a lot stronger than my nephew Bryce at a year old and for a while after that. They are not brother and sister and are not in the same age group, Bryce is like 5 years younger than Micayla. But my nephew was small when he was born and still is small for his age. He's perfectly healthy and active and all of that good stuff and so was Micayla, it's just that because of his size at those times he wasn't as strong as Micayla was at those times in her life. I truly do not think that gender has anything to do with a childs strength. I think it just simply has to do with their size and health and things like that