miguel life By migueltt Jan 29, 1998 Skin starts to become wrinkled. Period: Oct 14, 1998 to Oct 18, 1998 zygote Period: Oct 18, 1998 to Dec 14, 1998 Embryo Period: Dec 14, 1998 to Jul 14, 1999 Fetus Period: Jul 14, 1999 to Jul 14, 2001 Infancy Jun 1, 2000 Eyelids can open and weight can be up to 6.6 pounds. Dec 12, 2000 Heart beats regularly. Eyes and ears begin to form. Jun 15, 2001 Aging begins. Period: Jul 14, 2001 to Jul 14, 2012 Childhood Aug 18, 2001 A baby can hold its head up and reach for objects. Dec 15, 2004 Bones are visible. Heartbeat can be heard with a stethoscope. Feb 19, 2005 Fingerprints form. Sep 3, 2006 Aging becomes more noticeable and progresses rapidly. Jun 16, 2009 Infant begins to crawl. Dec 13, 2009 Heart develops right and left chambers. Apr 20, 2010 Ovulation in females, and sperm production in males begin. Period: Jul 14, 2012 to Jul 14, 2019 Adolescence Period: Jul 14, 2012 to Jul 14, 2034 Puberty Period: Jul 14, 2019 to Jul 14, 2099 Adulthood