The neural tube is what you hear a lot about when you're talking about folic acid and preventing neural tube defects. This is why folic acid and prenatal vitamins prior to pregnancy and in early pregnancy are so important.
Social Baby Updates
Share your baby's progress with friends and family on Facebook and Twitter. Just copy and paste the following into you status update on Facebook or your Twitter stream:
At 5 weeks my baby's heart is beginning to beat but I can't see a physical difference yet. http://ow.ly/53EMS