Second child's being taller than the first one?

[reboun]

There has always been a discourse that second child is usually taller than the first one and as far as I observed, it is correct for most families I know. Let me give you an example from my family. My older sister is the first child of my parents whereas I am the second one. I am 1.85 m (6 feet 1) tall, my sister is 1.68 m (5 feet 6) tall. If she was a male, she would be about 1.81 m (5 feet 11.5) tall, which is still shorter than my height. Is there any genetic explanation why second child of a family is usually taller than the first one?

By the way, my mother is 1.67 m (5 feet 5.5) and my father is 1.75 m (5 feet 9) tall.

[gixajo]

Not always, except if you cut both legs of the first child.

[reboun]

Not always, except if you cut both legs of the first child.

https://www.theapricity.com/forum/image.php?u=26483&dateline=1698795095

[retfala]

my brother and I are of the same height. Sister is 174cm, so if she was a male, she would be also of the same height or even taller.
So no.

[WalkiriaTyr]

My taller child is the third 1,85 mts 16 years old
My second child 1,67 mts 18 years old
My first Child 1,75mts 21 years old
And my 4th kid is small yet but aleady tall, his doctor told me we spect at least 1, 85mts