[Expert consensus from the College of French Gynecologists and Obstetricians: Management of nausea and vomiting of pregnancy and hyperemesis gravidarum].

OBJECTIVE:To determine the management of patients with 1st trimester nausea and vomiting and hyperemesis gravidarum. METHODS:A panel of experts participated in a formal consensus process, including focus groups and two Delphi rounds. RESULTS:Hyperemesis gravidarum is distinguished from nausea and vomiting during pregnancy by weight loss≥5 % or signs of dehydration or a PUQE score≥7. Hospitalization is proposed when there is, at least, one of the following criteria: weight loss≥10%, one or more clinical signs of dehydration, PUQE (Pregnancy Unique Quantification of Emesis and nausea) score≥13, hypokalemia<3.0mmol/L, hyponatremia<120mmol/L, elevated serum creatinine>100μmol/L or resistance to treatment. Prenatal vitamins and iron supplementation should be stopped without stopping folic acid supplementation. Diet and lifestyle should be adjusted according to symptoms. Aromatherapy is not to be used. If the PUQE score is<6, even in the absence of proof of their benefit, ginger, pyridoxine (B6 vitamin), acupuncture or electrostimulation can be used, even in the absence of proof of benefit. It is proposed that drugs or combinations of drugs associated with the least severe and least frequent side effects should always be chosen for uses in 1st, 2nd or 3rd intention, taking into account the absence of superiority of a class over another to reduce the symptoms of nausea and vomiting of pregnancy and hypermesis gravidarum. To prevent Gayet Wernicke encephalopathy, Vitamin B1 must systematically be administered for hyperemesis gravidarum needing parenteral rehydration. Patients hospitalized for hyperemesis gravidarum should not be placed in isolation (put in the dark, confiscation of the mobile phone or ban on visits, etc.). Psychological support should be offered to all patients with hyperemesis gravidarum as well as information on patient' associations involved in supporting these women and their families. When returning home after hospitalization, care will be organized around a referring doctor. CONCLUSION:This work should contribute to improving the care of women with hyperemesis gravidarum. However, given the paucity in number and quality of the literature, researchers must invest in the field of nausea and vomiting in pregnancy, and HG to identify strategies to improve the quality of life of women with nausea and vomiting in pregnancy or hyperemesis gravidarum.