There's the birds and the bees. And then there's what happens after. The process that leads to the beginning of pregnancy has a lot more twists and turns than a happenstance meeting. Today on Short Wave, NPR health reporter Selena Simmons-Duffin talks about the science of the very first week of pregnancy.Read Selena's full explainer by clicking this link. Or Pregnancy-Info-Guide-2023-Printable.pdf">download and print it here. Have an incredible science story to share? Email us at shortwave@npr.org.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy