Scientists grow whole model of human embryo, without sperm or egg The research helps understanding of the earliest moments of life and the reasons behind infertility. www.bbc.com 핵심 포인트 : 1. The Weizmann Institute team say their "embryo model", made using stem cells, looks like a textbook example of a real 14-day-old embryo. It even released hormones that turned a pregnancy test positive in the ..