At 18 weeks of pregnancy, how many months pregnant is that?

At 18 weeks of pregnancy, a woman is typically considered to be four and a half months pregnant. During pregnancy, one month is generally calculated as four weeks. A full-term pregnancy is defined as 37 weeks, while the estimated due date (EDD) is calculated at 40 weeks—equivalent to approximately ten lunar months. Pregnant women should attend scheduled antenatal check-ups to monitor fetal growth and development continuously, thereby helping to prevent conditions such as fetal overgrowth or intrauterine growth restriction.