Answer: The foetus vx means foetus is in vertex position.
The vertex position is the position your baby needs to be in for you to give birth vaginally.Most babies get into a vertex, or head down, position near the end of your pregnancy, between 33 and 36 weeks. Even babies who are breech up until the very end of pregnancy can turn at the last minute. Typically, once a baby is head down and low enough in your pelvis, they’ll stay put.The vertex position is when a baby is positioned to come head down through a woman's vagina during birth. Although there are different, more specific positions that the baby's head can take during the actual delivery process, if your baby's head is pointing down toward your vagina, you're in good shape.