Paul Prince is so lucky to have the best science teacher mrs. gaudet By 713405 Oct 12, 1997 Heart beats regularly. Eyes and ears begin to form. Jul 12, 1998 Eyelids can open and weight can be up to 6.6 pounds. Sep 5, 1998 Bones are visible. Heartbeat can be heard with a stethoscope. Sep 6, 1998 Fingerprints form. Sep 12, 1998 A baby can hold its head up and reach for objects. Jan 12, 1999 Infant begins to crawl. Jun 12, 2007 Ovulation in females, and sperm production in males begin. Jun 12, 2028 Skin Starts to become wrinkled Jun 12, 2028 Aging begins.