**Core Concept**
Mammography is a type of medical imaging that uses low-energy X-rays to produce images of the breast tissue. It is primarily used for early detection of breast cancer and for evaluating breast abnormalities. The effectiveness of mammography depends on various factors, including breast density and the presence of calcifications.

**Why the Correct Answer is Right**
Mammography is particularly useful in detecting microcalcifications, which are small deposits of calcium that can be indicative of breast cancer. The technique is also effective in visualizing the ductal and lobular structures of the breast, making it easier to identify abnormalities such as masses and distortions. In addition, mammography can be used to evaluate the extent of breast cancer and to guide biopsy procedures.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because mammography is not the best choice for evaluating fetal development during pregnancy. Ultrasound is generally preferred for this purpose due to its safety and effectiveness in visualizing fetal anatomy.
**Option B:** This option is incorrect because while mammography can be used to evaluate breast cancer in men, it is not the best choice for screening asymptomatic men for breast cancer. Men with a family history of breast cancer or other risk factors may require more aggressive screening.
**Option C:** This option is incorrect because while mammography can be used to evaluate breast cancer in women with a history of radiation exposure, there are other imaging modalities that may be more effective in this situation, such as MRI.

**Clinical Pearl / High-Yield Fact**
Mammography is most effective in detecting breast cancer in women over the age of 40, as the risk of breast cancer increases with age. Women with a family history of breast cancer or other risk factors may require more frequent screening.

**Correct Answer: D. Evaluating breast abnormalities in women over 40.**