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.
In the second scenario, the irritation around the breast could be as a result of an infection during lactation-mastitis. There are two causes of mastitis, and the one that is responsible for an itching nipple is attributed to bacteria that infect a break in the skin/nipple during lactation, causing inflammation.