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.
The complete meiosis process in human males takes about 74 hours. Spermatogenesis usually begins at 12-13 years of age and continues throughout life. Several hundred million sperm cells are produced daily by healthy young adult males. Between 200 and 600 million sperm cells are normally released in each ejaculation.