Because the Neuralrohr and central spinal cord already develop during the first four pregnancy weeks, it is important that here enough folic acid is available in the motherly organism. Doctors recommend to begin with the taking of folic acid already 3 months before a planned conception.
- Wilson RD: Pre-conception Folic Acid and multivitamin
Supplementation for the Primary and Secondary
Prevention of Neural tube Defects and Other
Folic Acid sensitive Congenital Anomalies. J Obstet Gynaecol Can. In 2015 Jun; 37 (6):534-52.