ELA.6.9A Compare and contrast the stated or implied purposes (e.g., inform, influence, entertain, express) of different authors writing on the same topic. ELA.6.10A Summarize the main ideas and supporting details in text, demonstrating an understanding that a summary does not include opinions.
The shape of the breast, its size, position of nipple and their numbers are also genetically determined. Any alteration in the basic genes or the presence of a predetermined gene that governs the shape and size of the nipples can cause the nipples to be inverted.
Hormonal changes are a common cause of nipple symptoms. Hormonal changes can occur at the onset of puberty; during menstrual cycles, pregnancy, breastfeeding, perimenopause and menopause; and with the use of hormone medications. Nipple symptoms can be caused by physical changes, such as weight fluctuations, or other causes, such as nipple injury or breast surgery. Nipple symptoms can also be caused by breast cancer and other diseases, disorders or conditions, such as breast infections and hypothyroidism (underactive thyroid).