Nasal congestion during pregnancy.

Twenty-one pregnant women with nasal congestion, verified by rhinomanometry, did not differ significantly from 8 pregnant women without nasal congestion regarding the serum levels of the hormones oestradiol, progesterone and VIP. The congested group had a significantly lower serum level of oxytocin than the reference group. There were no differences in the symptoms urinary incontinence, constipation, and heartburn between the groups. The pathophysiology of nasal congestion during pregnancy is still veiled in obscurity.