Differential Diagnosis for Light Brown Discharge in Pregnancy
Single Most Likely Diagnosis
- Normal vaginal discharge: A light brown discharge during pregnancy can be a variation of normal vaginal discharge, which increases in amount and changes in consistency due to hormonal changes. This discharge is usually odorless and doesn't cause any irritation.
Other Likely Diagnoses
- Bacterial vaginosis: An imbalance of vaginal bacteria can lead to an infection, causing a light brown or grayish discharge with a fishy odor.
- Yeast infection: A fungal infection that can cause a light brown or white discharge, often accompanied by itching and irritation.
- Cervical ectropion: A condition where the glandular cells lining the inside of the cervix protrude to the outside, potentially causing a light brown or pinkish discharge.
Do Not Miss Diagnoses
- Placenta previa: Although less common, any vaginal bleeding or discharge during pregnancy should prompt consideration of placenta previa, especially if the discharge is accompanied by pain or heavy bleeding.
- Preterm labor: A light brown discharge could be a sign of preterm labor, especially if accompanied by other symptoms like regular uterine contractions, back pain, or a sudden gush of fluid.
- Chorioamnionitis: An infection of the membranes surrounding the baby, which can cause a foul-smelling discharge and is a serious condition requiring immediate medical attention.
Rare Diagnoses
- Cervical cancer: Although rare, any abnormal vaginal discharge during pregnancy should prompt a thorough evaluation to rule out cervical cancer, especially in women with a history of abnormal Pap smears.
- Group B strep infection: A bacterial infection that can cause a light brown or yellowish discharge and is a concern during pregnancy due to the risk of transmission to the newborn.