Yes. Many STD infections cause no signs or symptoms in women. Women may be infected deep inside, where symptoms are not easily seen. Untreated STDs can cause problem pregnancies or even prevent a woman from getting pregnant. Often a woman has no idea that she has an STD until the infection has caused lasting damage.
STDs can also be passed from an infected mother to her baby during pregnancy or at birth. However, early treatment can often protect the baby from illness or death.