Exceptionally large babies increase a mother's mortality risk when giving birth and exceptionally small babies tend to die at birth or shortly afterward. for these reasons, birth weight in human babies is generally:

The weight that is considered normal for a newly born baby that is born between 37 and 40 weeks is 2.7 to 4.1 kg or 6 to 9 lbs whereas exceptionally big babes weigh in average at 5.00 kg or 11 lbs.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

children tend to take more after their grandparents more than their parents. it’s the dna you received that was passed down to you somewhere in your family. maybe one of your grandparents had/has straight hair and you might have gotten it from them.