Our results emphasize the importance of performing a detailed US examination at 11 to 14 weeks' gestation in identification of fetal structural defects.

Key Clinical MessageIn the presence of megacystis in the second half of pregnancy, with increased amniotic fluid, especially in a female fetus, the most likely diagnostic result is megacystis, microcolon, intestinal hypoperistalsis syndrome, MMIHS. In these cases, the diagnosis of MMIHS should be strongly considered instead of lower urinary tract obstruction.

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Cord blood collection for stem cell storage remains a popular procedure due to the advantages associated to it. In the last ten years, the therapeutic potential of umbilical cord stem cells was demonstrated in the treatment of bone pathologies, neuropsychiatry, metabolic and genetic diseases. There are several factors with direct influence on the quality and quantity of cord blood collection for stem cell storage. The collection principles should be individualized according to the maternal and fetal characteristics. Furthermore, in the context of COVID-19 pandemic, additional information can be obtained through this procedure. We present a specific case-adapted strategy for the collection of umbilical cord blood and its application in analyzing the transplacental transfer of maternal COVID-19 antibodies after vaccination. We suggest that the informed consent offered to the future parents prior to the procedure should include the history of COVID-19 during pregnancy, the vaccination status of the mother and the gestational age at the time when this event occurred.