Anterior vs. Posterior Pituitary: Key Hormones, Functions & Health Impact

The pituitary gland has two lobes: the Anterior pituitary (adenohypophysis) makes and releases six key hormones; the Posterior pituitary (neurohypophysis) stores and secretes two hormones made in the hypothalamus.

People hear “pituitary” and picture a single switchboard. In medical dramas, a “brain tumor” often blurs the halves, so patients Google symptoms without knowing which lobe drives growth, stress, or water balance.

Key Differences

Anterior: GH, TSH, ACTH, LH, FSH, PRL. Posterior: ADH, oxytocin. One is a hormone factory; the other is a delivery service.

Examples and Daily Life

Short kids get Anterior GH shots; marathoners misusing Posterior ADH risk fatal water retention. Pregnant women rely on Posterior oxytocin for labor, while Anterior PRL handles breastfeeding.

Which lobe affects height?

Anterior pituitary; its growth hormone decides bone length.

Can a tumor hit both lobes?

Yes—large adenomas or surgery can disrupt both, mixing dwarfism with diabetes insipidus.

How do doctors test each?

Blood assays for Anterior hormones; water-deprivation test for Posterior ADH.

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