Science-backed articles on fertility, conception, and reproductive health.https://www.whentottc.com/en-ushttps://www.whentottc.com/learn/does-running-hard-hurt-your-fertility/https://www.whentottc.com/learn/does-running-hard-hurt-your-fertility/My providers told me any exercise was fine while trying to conceive. The research says something more specific — and the problem turns out to be less about how hard you run than about what you eat afterward.Thu, 23 Jul 2026 00:00:00 GMThttps://www.whentottc.com/learn/how-ultra-processed-foods-affect-fertility/https://www.whentottc.com/learn/how-ultra-processed-foods-affect-fertility/A new study asked how ultra-processed food consumption affects fertility and early embryonic development — and the answer was more surprising than expected.Wed, 24 Jun 2026 00:00:00 GMThttps://www.whentottc.com/learn/whats-actually-happening-when-you-breastfeed-a-sick-baby/https://www.whentottc.com/learn/whats-actually-happening-when-you-breastfeed-a-sick-baby/When my husband came home sick, I started wondering whether breastfeeding would protect our son. A deep dive into the science of antibodies in breastmilk — and what actually happened when illness hit our house.Tue, 02 Jun 2026 00:00:00 GMThttps://www.whentottc.com/learn/how-long-will-it-take-to-get-pregnant/https://www.whentottc.com/learn/how-long-will-it-take-to-get-pregnant/A deep dive into the data behind this calculator — how age and contraceptive history affect your timeline, what the studies can and can't tell you, and what to do with this information.Wed, 01 Apr 2026 00:00:00 GMT