Learn more about first trimester growth: https://wb.md/34eI3pX From a fertilized egg to a garlic-bulb-sized baby, here’s how your growing little one develops week-to-week through the first trimester. Download the WebMD Pregnancy App here: http://taps.io/BqZ2Q Subscribe to WebMD here: https://www.youtube.com/user/WebMD Follow WebMD here: Website: http://webmd.com Facebook: https://www.facebook.com/WebMD/ Pinterest: https://www.pinterest.com/webmd/ Twitter: https://twitter.com/WebMD Instagram: https://www.instagram.com/webmd/