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Results for “LACTATION/physiology”

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PubMed1961

Release of oxytocin in unanaesthetized lactating rats.

The action of certain substances on the release of oxytocin has been studied in unanaesthetized lactating rats. The release of oxytocin has been assessed by the increase in weight after suckling of rats separated overnight from the mother. A large variety of substances appear to block the release of oxytocin. These include pentolinium, atropine and chlorpromazine. Adrenaline and noradrenaline also cause a block in the release of oxytocin, and it is suggested that adrenaline blocks the central release of oxytocin as well as blocking its peripheral action. Reserpine and oestradiol in the doses administered did not block the release of oxytocin. Block also occurred after the ingestion of water, ethanol and normal saline, an effect which may be produced indirectly by impulses from the gastro-intestinal tract.

Animals↗
PubMed1961

Stress-induced block of milk ejection.

A simple method has been described by which the action of drugs on the stress-induced block in milk ejection can be investigated on lactating guinea-pigs. Reserpine, meprobamate and chlorpromazine when administered to the lactating mother at various periods before suckling reduced the block in milk ejection caused by the stress. Dibenamine and dichloroisoprenaline did not affect in any way the stress-induced block. It is suggested that the stress-induced block in milk ejection is probably a nervous block and not mediated through adrenaline.

Breast Feeding↗