Take healthy home made food regularly and drink lots of water with other fluids as much as possible in pregnancy.. avoid outside food.. dont forget to take vitamins supplement suggested by your doctor.. dont put heavy weight and avoid sex in first and last trimester. 
do meditation &amp; walk daily. read good books. check these articles.

<a href="http://app.babychakra.com/article/5085">Foods To Avoid During Pregnancy</a>

<a href="http://app.babychakra.com/article/5477">Activities To Be Avoided During Pregnancy</a>

<a href="http://app.babychakra.com/article/3431">Screening Tests Recommended For Every Mom During First Trimester Of Pregnancy</a>

<a href="http://app.babychakra.com/article/1761">Pregnant? Here is The Ultimate Diet Plan to Meet Your Nutritional Needs!</a>

My wife is 6 weeks pregnant. What are the precautions that should be taken at this stage? Can anyone help me out.