The list of conditions, chemicals, nutritional factors and other things that can

The list of conditions, chemicals, nutritional factors and other things that can affect a prenatal fetus is long and lengthy, in Chapter 3. 
(1) Which section, which topics, stand out for you as being important for all pregnant women and families to know?  Please include a quote to illustrate or provide detail on your topic. 
(2) Have you heard of any other behavior, chemical or other factor that is supposed to affect prenatal development, not mentioned in the chapter?  If so, what have you heard?  Does it have any evidence?
What’s Going On In There? How the Brain and Mind Develop in the First Five Years.
Lise Eliot
Paperback: 544 pages
Publisher: Bantam; 1 edition (October 3, 2000)
ISBN: 978-0553-3782-52