Alkaline phosphatase levels naturally increase during the third trimester because the placenta produces this enzyme as your baby grows. A level of 138 is typically considered normal during pregnancy and does not usually pose any risk to your baby or the delivery. However, your doctor may still monitor your liver function and perform other tests to rule out any liver or bile duct issues.

High GGT and ALP levels may occur due to liver inflammation, blocked bile ducts, gallbladder problems, fatty liver, alcohol consumption, certain medications, or bone disorders. Your doctor will interpret these results alongside your other tests and symptoms and may recommend further investigations, such as an ultrasound or bone scans, to determine the exact cause and guide appropriate management.

A gradual increase in ALP with normal liver tests may be caused by liver or bone problems, bile duct obstruction, or even normal growth or healing processes. Certain medications and vitamin deficiencies can also raise ALP. Since your levels have increased over the past six months, your doctor may recommend further tests to determine the exact cause and ensure there is no underlying serious condition.