This week the baby continues to grow and develop. He is about the size of the head of a pin. The fertilized egg burrows further into the uterine lining.
The HCG that the placenta is producing lets the ovaries know not to ovulate again.
The heart begins to beat and circulate blood.
You still do not feel any different than before you became pregnant.
Some books that I studied from are:
The Pregnancy Book - Everything you need to know from America's baby experts.
By: William Sears, M.D., and Martha Sears, R.N., and Linda Holt, M.D., F.A.C.O.G.
Your Pregnancy - Week by week
By: Dr. Glade Curtis, OB/GYN and Judith Schuler, M.S.
You & Your BABY Pregnancy - Your ultimate week-by-week pregnancy guide
By: Dr. Laura Riley, OB/GYN