Guidelines. The Czech Society for Ultrasound in Obstetrics and Gynecology of the Czech Medical Association of J. E. Purkyně issues this opinion in connection with statements of the World Health Organization (WHO) and other international authorities regarding the concerns about COVID-19 infection in pregnancy. The impact of this year's coronavirus COVID-19 infection on pregnant women seems to be less severe than in previous years of H1N1 influenza type A, SARS-CoV or MERS-CoV. From the information published so far it was not possible to prove the transmission of infection from mother to fetus. It also seems that there is no risk of vertical transmission during breastfeeding. This opinion does not replace the recommendations and opinions issued by governmental bodies such as the Ministry of Health and others, and concerns solely consultation of pregnant women.