The oldest person on record to have a baby naturally, without infertility treatment, was a 59-year-old British woman who gave birth in 1997, according to Guinness World Records.ay 26, 2014 | By Marni Jameson, Orlando Sentinel. A 46-year-old from Orlando has become the oldest woman to have a baby through in vitro fertilization using her own fresh — not frozen — biological eggs. Belinda Slaughter delivered her first child — a healthy baby boy — last September.