We report on a patient with a diagnosed obstructive sleep apnoea syndrome (OSAS) who became pregnant during treatment with the nCPAP (nasal continuous positive airway pressure) apparatus, and gave birth. In the literature search we didn't find any similar case report. The present view on OSAS treatment with particular regard to the use of nCPAP is also presented. Through reviewing literature we analysed positive effects of this kind of treatment on mother and fetus. The negative aspects of nCPAP treatment are discussed.