I'm 35 and haven't had kids yet. I'm trying to delay menopause until I'm 60. Courtesy of Kayla Barnes-Lentz Kayla Barnes-Lentz is trying to delay menopause to age 60 to extend health and fertility. She follows a strict routine and tests experimental treatments for ovarian health, including rapamycin. Proven methods for protecting reproductive health include taking antioxidants and leading a healthy lifestyle. This as-told-to essay is based on a conversation with Kayla Barnes-Lentz, the 35-year-old   host of the "Longevity Optimization Podcast," based in Austin. It has been edited for length and clarity. The average age at which women go into menopause in the US is 52. My goal is to delay going into menopause until I'm 60. I'm trying to live in good health for as long as possible. And as a woman, one part of this is ovarian health.…