Human Placental Lactogen (HPL)

HPL* is another of the protein hormones formed by the placenta. It is similar to the pituitary growth hormone.

HPL can be detected in the serum at the 6th week of pregnancy, and it's levels continue to rise with growth of the placenta. In pregnancies with smaller placentas, there is less HPL detected. The highest concentration in the blood occurs in late pregnancy.

The functions of HPL are to:

The latter function occurs several ways:

There will be more information on insulin, the pancreas, and diabetes later in the course.

*also known as human chorionic somatotropin (HCS)

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