Fortunately, the absolute risk for complications for any one woman is very low (less than 1%). But the relative risks for problems -- such as clotting and early labor -- are significant, the new study found. … Among the COVID-19 patients, the researchers found the relative risk of developing any type of blood clot was nearly five times higher than for those without the virus … These women were also far more likely to need intensive care or a ventilator, the researchers found. Those who had the virus were: 7% more likely to need a C-section, 19% more likely to have preterm labor, 17% more likely to have a preterm delivery, 21% more likely to have preeclampsia.