This site is like KidSpiration, but it is free and easy to use. elements story, create-your-own-topic. Source: Liz Phillips. After a teacher types in the story starter, students log in to write. read, the class decides which direction the story should take. class agrees the story is finished.
Fetal development - month 1. First trimester. At the end of four weeks: Baby is 1/4 inch long. Heart, digestive system, backbone and spinal cord begin to form. Placenta (sometimes called afterbirth) begins to develop. The single fertilized egg is now 10,000 times larger than it was at conception.
Each has the basics to more in depth coverage of both fetal development and how the changes occur in the mother's body. 1  Pregnancy Calendar: Week by Week. 2  Your Pregnancy in Pictures. 3  Your Pregnant Body: Month by Month.  How big is my 1  baby? Your Pregnancy: Three Trimesters.  Due Date Communities.