Task: Answer Verification
Input (English): Question: Is the pregnancy-related decrease in fasting plasma homocysteine explained by folic acid supplementation , hemodilution , or a decrease in albumin in a longitudinal study?
Answer: This study refutes the previous explanations for the reduction in plasma tHcy known to occur in pregnancy, namely, folic acid supplementation, hemodilution, and a decrease in serum albumin. We suggest that the changes may be endocrine-based.
Output (English): no