This is some info I found that is very important to know if you are expecting or hoping to be soon! Take a look at the links below.

I didn't go to any type of Dr. or even my midwife until much later than 4.5 m. However... I knew what to expect from my body, and I altered my diet to fit the nutritional needs I had as a "pregnant lady".  You have to be mindful of how your body reacts and what it needs.  I have been 'watching what my body needs' in the terms of supplements for several years now, so I know what to look for.

Leafy vegetables, such as broccoli, spinach and asparagus, contain naturally occurring folic acid. 

Prevention of pregnancy complications

Studies have proven that folate consumption during pregnancy prevents deficiency and anemia in pregnant women. Low folate levels during pregnancy may contribute to birth defects and pregnancy loss. Consuming a high dietary intake of folate and taking folic acid supplements orally during pregnancy reduces the risk of neural tube birth defects in the infant.