Maternal obesity (defined as prepregnancy maternal BMI≥30 kg/m2) is a risk factor strongly associated with serious perinatal complications and its prevalence has increased rapidly in a general population during the last decades. Therefore, following international approach to regulate perinatal care in this population, Group of Experts of Polish Gynecological Society developed these new guidelines concerning perinatal care in obese pregnant women, including women after bariatric surgery. The recommendations cover detailed information on specific needs and risks associated with obesity in women of reproductive age, pregnancy planning, antenatal care, screening, prophylaxis and treatment for other pregnancy complications characteristic for maternal obesity, fetal surveillance, intrapartum care and post-partum follow-up. Pregnancy planning in these patients should involve dietary recommendations aiming at well balanced diet and daily caloric uptake below 2000 kcal and modest but regular physical activity with sessions every two days starting from 15 min and increased gradually to 40 min. Laboratory work-up should include tests recommended in general population plus fasting glycemia and oral glucose tolerance if necessary, thyroid function, lipid profile, blood pressure and ECG. Patients after bariatric surgery should allow at least one year before they conceive and have their diet fortified with iron, folic acid, calcium and vit. B12. Antenatal care should include monitoring body weight gain with a target increase in body weight less than 7 kg, thromboprophylaxis, strict monitoring of blood pressure and diagnostic for gestational diabetes in early pregnancy. Fetal ultrasonic scans should be arranged following protocols recommended by US section of Polish Gynaecological Society with additional scan assessing fetal growth performed within 7 days before delivery and aiming at assessing a risk for shoulder dystocia in a patient. Intrapartum care should be delivered in referral centers where fetal and maternal intrapartum complications can be addressed, preferably equipped with a proper medical equipment necessary to deal safely with extremely heavy individuals. Medical staff taking intrapartum care for obese parturient should be also aware of reduced reliability of methods used for intrapartum fetal surveillance, increased risk for intrapartum fetal death, maternal injuries, postpartum haemorrhage, shoulder dystocia, thrombophlebitis and infection. Pediatrician should be also available due to increased neonatal morbidity mainly due to meconium aspiration syndrome, hypoglycemia, and respiratory distress syndrome. In puerperium, medical staff should be prepared to deal with breastfeeding disturbances and increased maternal mortality.