Mycobacterial infection in pregnancy can affect the fetus, especially in early pregnancy, mycobacterial vaginitis may cause preterm miscarriage or embryonic arrest, and needs to be treated promptly. If you have mycosis vaginalis in the middle or late stages of pregnancy, you should also treat it with these medications in a timely manner, as failure to do so may cause premature rupture of membranes or miscarriage. If the mycosis is contracted near the time of delivery, it can cause vaginal congestion and edema, which, if delivered vaginally, can cause vaginal laceration or infection of the fetus and mycobacterial infection of the fetal throat.