Coronavirus disease 2019 (COVID-19) is an infectious disease that can lead to severe respiratory symptoms. Pregnant women have an increased risk for a severe course. Therefore, the Association of the Scientific Medical Societies in Germany (AWMF) Guidelines 015/092 “SARS-CoV‑2 in pregnancy, childbirth, and the puerperium” were established to standardize care in the COVID-19 pandemic. The guideline group used data from the “COVID-19 related obstetrics and neonatal outcome study” (CRONOS) to generate evidence-based recommendations for action. CRONOS collects data from more than 130 affiliated maternity hospitals nationwide in Germany. According to the study, pregnant women positive for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are often asymptomatic; however, in 1 out of 25 detected infections there is a severe course requiring intensive medical treatment. Thromboembolism occurs in 1 out of 30 women hospitalized for COVID-19. An infection of the neonate of a mother infected peripartum is occasionally detected (about 1 out of 20 infants) and usually remains without consequence in the short-term outcome. Many other questions have been answered using CRONOS data. The registry is still open and recruiting and will also provide more in-depth information on different virus variants and vaccination in the future with more than 6000 cases. CRONOS is exemplary for an unprecedented cooperation of gynecologists during the pandemic.