The objective: peculiarities of pregnancy in women with common worm infestations in Baku. Materials and methods. During the period from 2015 to 2017, 152 women with common worm infestations were examined, in the gestation period from 16 to 40 weeks in the age group from 18 to 38 years. Depending on the nature of the infestation, 2 main groups were formed: the 1st main group included 84 women who had monoinvasia of helminths, and the 2nd main group included 68 women who had mixed helminth infestation. The control group consisted of 42 women who were pregnant without helminthiasis. All women were examined at 16–22, 23–29, 30–36 and 37–40 weeks of pregnancy. Helminthosis diagnostics was performed by detecting helminth eggs in faecal smears, pinworm eggs in scraping from perianal folds, and visual detection of helminth eggs or pinworms in faeces and vomit. Results. Common symptoms of early toxicosis are nausea, hypersalivation, and vomiting. A rare form of morning sickness treat dermatosis pregnant women, pregnant bronchial asthma, tetany, acute yellow atrophy of the liver, osteomalacia. Symptoms of toxicosis were evaluated in 152 pregnant women. The main symptoms of early toxicosis–nausea, hypersalivation and vomiting–were more common in pregnant women with helminthiasis than in women of the control group. In women with helminthiasis, a symptom complex similar to the manifestations of early toxicosis may persist throughout pregnancy, despite ongoing toxicosis therapy. Since persistent nausea and vomiting can be etiologically caused by helminthic-protozoic intoxication, the frequency of nausea and vomiting in different groups in the second and third trimesters was compared. In the second half of pregnancy, women with complaints of nausea and vomiting were present in all study groups, but they were more common in pregnant women with helminthiasis than in women in the control group. Conclusions. The data obtained on the more frequent manifestation of early toxicosis in pregnant women with helminthiasis and its demonstrated resistance throughout pregnancy prove that helminth infestations negatively affect the course of pregnancy. Key words: helminth-protozoal invasion, placental insufficiency, pregnancy.