A period while pregnant is not a true menstrual period, but vaginal spotting or bleeding can occur during pregnancy. This guide explains possible causes, including very early spotting, cervical changes, bleeding after sex, miscarriage, ectopic pregnancy, molar pregnancy, placental complications, and labour-related changes. It also covers brown discharge, details to track, and what to do when bleeding begins. Most importantly, parents will learn which warning signs—such as heavy bleeding, severe pain, shoulder-tip pain, dizziness, fainting, contractions, or fluid leakage—require prompt or urgent medical assessment.