Human placental lactogen

This is a test to measure the amount of human placental lactogen (HPL) in the blood. HPL is a placental hormone that brings on insulin resistance and carbohydrate intolerance. HPL also breaks down maternal fats to provide fuel for the fetus.

Blood is drawn from a vein, usually on the inside of the elbow or the back of the hand. The puncture site is cleaned with antiseptic, and an elastic band is placed around the upper arm to apply pressure and restrict blood flow through the vein. This causes veins below the band to fill with blood.

A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. During the procedure, the band is removed to restore circulation. Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.

No special preparation is needed.

For children:

The preparation you can provide for this test depends on your child's age, previous experiences, and level of trust. For specific information regarding how you can prepare a child 12 to 18 years, see adolescent test or procedure preparation.

When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.

The uses of this test are limited to certain rare conditions and medical research.

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