It is generally considered normal for the placenta to be at least 2 cm away from the internal os at 28 weeks of pregnancy. Your current measurement of 2.5 cm falls within this range and is not typically associated with complications.
However, it's important to note that placental position can vary throughout pregnancy. While there is a chance that it may move further away from the internal os by 32 weeks, there is no guarantee.
If the placenta remains close to or covering the cervix (known as placenta previa) by the time you reach full term, it can lead to complications during labor and delivery. These complications may include heavy bleeding or difficulty in delivering the baby naturally.
To monitor your placental position, your healthcare provider will likely schedule a follow-up ultrasound closer to your due date. This will help determine if any changes have occurred and if any additional precautions need to be taken.
In most cases, even if the placenta does not move up sufficiently by 32 weeks, a cesarean section can be planned in advance to ensure a safe delivery for both you and your baby.
It's essential to discuss any concerns or questions about your specific situation with your healthcare provider, as they can provide personalized guidance based on your medical history and individual circumstances.