Final answer:
Nipple discharge during a breast examination in a pregnant female client should be reported to the provider, as it may indicate a breast pathology, whereas other changes such as breast enlargement and areola discoloration are typical during pregnancy.
Step-by-step explanation:
When a nurse is performing a breast examination on a female client who is pregnant, the finding that should be reported to the provider is Option 1: Nipple discharge. While enlargement of breast size, decreased sensitivity in the breast, and pinkish discoloration of the areola are normal changes during pregnancy due to hormonal fluctuations and advancement of mammary tissue, unusual nipple discharge can be a sign of breast pathology and should be evaluated further by a healthcare provider. Women are encouraged to perform monthly breast self-exams to detect lumps or subtle changes that could indicate breast cancer, where early detection is crucial for better outcomes.