Muscle strain or overuse: This is a common issue in pregnancy due to increased weight and altered gait, which can put additional strain on the calf muscles.

Varicose veins: Pregnancy increases the risk of varicose veins due to increased blood volume and venous pressure, which can cause calf pain.
Deep vein thrombosis (DVT) symptoms can sometimes be mild: While not the first consideration, DVT is a known risk in pregnancy, especially in the later stages, and can cause calf pain.
Peripheral edema: Swelling in the legs is common in pregnancy and can lead to discomfort or pain in the calves.

Deep vein thrombosis (DVT): Although mentioned earlier, it's crucial to emphasize that DVT is a potentially life-threatening condition that requires immediate medical attention. The risk factors in pregnancy, such as increased coagulability of blood, make it a critical diagnosis not to miss.
Pulmonary embolism (if symptoms suggest): While not directly causing calf pain, if there are associated symptoms like shortness of breath, it's essential to consider pulmonary embolism, especially if DVT is suspected.

Compartment syndrome: A rare but serious condition that can occur due to increased pressure within the muscle compartments, potentially leading to muscle and nerve damage.
Popliteal artery entrapment syndrome: A rare condition where the popliteal artery is compressed, leading to pain in the calf.
Neurological conditions affecting the lower limbs: Such as peripheral neuropathy, which can cause pain, numbness, or weakness in the calves, though these are less common in the context of pregnancy-related calf pain.