mabye you exercise them a little more than the rest of your body without realising or its just your dna. mabye thats just how you are built. dose anyone in your famliy also have bigger, stronger shoulders compared to rest of thier body?
The menstrual cycle is regulated by two hormones secreted from the pituitary gland, follicle stimulating hormone (FSH) and luteinizing hormone (LH). FSH and LH control the production of estrogen and progesterone, hormones are produced in the ovaries that determine the different stages of the menstrual cycle