It is actually quite common for babies to be in a head-down position by the time you reach 25 weeks of pregnancy. This is known as "cephalic presentation" and it means that the baby's head is positioned towards your pelvis. While being head down at this stage does not necessarily mean that you will have an early delivery, it does indicate that your baby is preparing for birth.
Most babies will naturally move into a head-down position between 32 and 36 weeks of pregnancy. However, some babies may remain in this position earlier on, which can be perfectly normal as well. Being in a cephalic presentation earlier on does not necessarily mean that you will go into labor prematurely.
It's important to note that every pregnancy is different, and there are various factors that can influence when labor begins. The position of your baby alone does not determine when you will deliver.
If you have any concerns about preterm labor or any other issues related to your pregnancy, it's always best to consult with your healthcare provider. They can provide personalized guidance based on your specific situation and address any concerns you may have.