Will drinking too much soy milk during pregnancy cause the fetal biparietal diameter to be larger?
Generally, drinking too much soy milk during pregnancy usually does not cause an increase in fetal biparietal diameter. If any abnormalities occur, it is recommended to seek medical attention promptly. The detailed explanation is as follows:

Soy milk primarily contains plant-based protein, dietary fiber, vitamins, and minerals, which provide nutritional support during pregnancy and help promote normal fetal development. However, these components do not directly cause excessive growth of the fetal skull bones. An increased fetal biparietal diameter is mostly associated with genetic factors, overall excessive nutrition during pregnancy, or gestational diabetes. Simply consuming too much soy milk will not directly lead to this condition; on the contrary, moderate consumption is beneficial for both mother and baby.
When drinking soy milk, ensure it is thoroughly cooked to avoid harmful substances present in raw soy milk that may affect health. Daily intake is recommended to be limited to 300–500 milliliters to prevent overburdening the gastrointestinal system. Pregnant women with gestational diabetes should choose unsweetened or low-sugar soy milk and include it within their daily total calorie intake to prevent blood glucose fluctuations. Additionally, maintain a balanced diet throughout pregnancy by including vegetables, fruits, meats, and other foods, avoiding excessive intake of any single food item to ensure healthy fetal development.