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J Environ Biol. 2013 Jan;34(1):99-105.

Cypermethrin induced pathological and biochemical changes in reproductive organs of female rats.

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Department of Zoology, College of Basic Science, Punjab Agricultural University, Ludhiana-141 004, India.


Cypermethrin, a synthetic pyrethroid, has broad spectrum use in domestic agriculture, and veterinary applications due to its high bioefficacy, enhanced stability and low mammalian toxicity. The present investigation was performed to investigate the sub acute effects of cypermethrin (25EC) in female rats. Cypermethrin (25EC) at a dose of 50 mg kg(-1) body weight (1/5th LD50) was orally given to female rats for 4 weeks. Control rats received similar amount of ground nut oil. Significant decrease in ovarian weight (15.4%) was observed after four weeks of cypermethrin administration while the uterine weight (68.2%) and thickness of myometrium increased at 2 and 4 weeks. Cypermethrin caused degenerative changes in ovary as evidenced by increased follicular atresia and decreased concentration of proteins (38%), lipids (20%), phospholipids (18%) and cholesterol (37%). Acid (49.2%) and alkaline phosphatase (41%) activities were increased while lactate dehydrogenase (37.9%) and 3beta-HSDH (31.3%) decreased in treated rat ovary.

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