The nurse is preparing to conduct a women's wellness seminar. What information should the nurse plan to include about risk factors for development of breast cancer? Select all that apply.

A. Fibrocystic breast disease is not related to breast cancer development, but fibrocystic changes can make it more difficult to feel early cancerous lumps during breast examination. B. Early menarche and/or late menopause increase the risk of developing breast cancer. C. Childless women, not those who have breastfed, are at increased risk. It is thought that pregnancy and lactation interrupt ovulation and alter the hormonal environment, reducing breast cancer risk. D. Postmenopausal women who are obese, not those with a lower BMI, are at increased risk. E. Women with first-degree relatives, such as a mother or sister, who had breast cancer are at risk.