Behavioral health refers to all behaviors that impact health. Mental health and substance use disorders are a very small, but attention getting subset of behavioral health, which includes behaviors related to obesity, diabetes, heart disease, HIV, even ebola, malaria, tuberculosis, and other diseases.
I don't think I said that ... I predicted that human cloning would be with us in 10 years and I still believe that is the case, because there is a demand among a small number of people for this technology to have babies. It's being driven by the marketplace.
Embryo implantation in humans. After fertilization the human embryo begins a 4 day long journey down the fallopian tube and into the uterus. When the embryo reaches the blastocyst stage it develops two distinct populations of cells. The outer cell mass,called the trophectoderm, and the inner cell mass. There is also a fluid filled cavity - as seen in the picture below.