These hypertrophic changes impose special problems and reduce the sensitivity for detecting breast lesions. A variety of benign disorders in addition to malignant tumors can affect the breast during pregnancy and lactation.Although pregnancy associated breast cancer (PABC) is relatively uncommon, yet a thorough evaluation of breast masses during pregnancy and lactation is required to rule out malignancy. Benign lesions may be specific for pregnancy and lactation as galactocele, lactating adenoma, breast infarct and gigantomastia, or non-specific as fibroadenoma and hamartoma. The majority of pregnancy-associated breast masses are benign; still, a thorough evaluation of any lesion is required, in order to rule out malignancy