To learn more about fetal development, please use the links below.

http://www.nlm.nih.gov/medlineplus/ency/article/002398.htm

MedlinePlus is the U.S. National Institutes of Health's Web site for patients and their families and friends. Produced by the National Library of Medicine, it brings you information about diseases, conditions, and wellness issues in language you can understand. MedlinePlus offers reliable, up-to-date health information, anytime, anywhere, for free.

www.americanpregnancy.org 

The American Pregnancy Association is a national health organization committed to promoting reproductive and pregnancy wellness through education, research, advocacy, and community awareness.

http://www.mayoclinic.com/health/prenatal-care/PR00112

Pregnancy, Week by Week--The Mayo Clinic
The Mayo Clinic logo represents the three underpinnings that continue their reputation as a pioneer and innovator in medicine - patient care, medical research and academic education.  Part of that mission is to serve as a reliable source of health information.