pg

pg picogram.

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pg

abbr.

picogram

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PG,

abbreviation for prostaglandin.

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picogram (pg) [pi´ko-gram]

one trillionth (10⁻¹²) of a gram.

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prostaglandin [pros″tah-glan´din]

any of a group of naturally occurring, chemically related, long-chain hydroxy fatty acids that stimulate contractility of the uterine and other smooth muscle and have the ability to lower blood pressure, regulate acid secretion of the stomach, regulate body temperature and platelet aggregation, and control inflammation and vascular permeability. They also affect the action of certain hormones. First found in semen, they have since been found in cells throughout the body and in menstrual fluid. There are nine types, designated by the letters A to I, the degree of saturation of the side chain of each being designated by subscripts 1, 2, and 3.

Prostaglandins are used clinically to control postpartum hemorrhage, to temporarily manage patent ductus arteriosus, and to treat impotence in men; prostaglandin injections into the amniotic sac, an in-hospital procedure, have been used as an abortion technique in pregnancies after the 16th week. About 30 minutes after an injection of prostaglandin F_2α, contractions begin, and abortion takes place within 19 to 20 hours.

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PG

prostaglandin.

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pg

picogram.

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PG

1 Postgraduate 2 Prostaglandin, see there 3. Proteoglycan