What to Expect stands as a market-leading pregnancy and parenting application developed by Everyday Health, Inc., maintaining a dominant position in the fertility and childcare app category with its 4.87-star rating. The platform serves as a comprehensive digital companion throughout the entire parenting journey, from early pregnancy through infant development stages, leveraging medical expertise and community insights. The application's core functionality revolves around detailed week-by-week fetal development tracking, providing users with scientifically accurate information about their baby's growth, size comparisons, and developmental milestones. Additional features include personalized parenting tips, symptom tracking, contraction timers, vaccination reminders, and feeding logs. The platform integrates thousands of medically reviewed articles and expert videos covering topics from nutrition to postpartum recovery, creating an all-in-one informational resource. User experience demonstrates thoughtful design with intuitive navigation separating pregnancy and baby tracking modules. The interface employs a clean, accessible layout with visual progress indicators and customizable tracking options. Real-world usage patterns show consistent engagement throughout pregnancy, with many users transitioning to baby growth monitoring post-delivery. The application maintains functionality across both phases, eliminating the need for separate tracking tools. User feedback consistently highlights the app's anxiety-reducing value through educational content, with reviewer Vayshaxo (August 3, 2025) noting it 'helped relieve a lot of anxiety by knowing what to expect.' First-time father Eddie_Mitchell (August 2, 2025) praised the continuous utility: 'It has turned into the best [app] after my daughter was born.' Repeated mentions appear regarding the week-by-week updates' educational value, though some users desire more creative fetal size comparisons. The application's primary strength lies in its comprehensive, medically validated content and seamless transition from pregnancy to postnatal tracking. Limitations include occasional requests for more engaging visual elements and personalized content depth. Ideal for expectant parents seeking evidence-based information and structured tracking throughout pregnancy and early infancy, particularly valuable for first-time parents navigating developmental milestones.