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Effect of methyl parathion formulation on estrous cycle and reproductive performance in albino rats.

Abstract
The animals were injected intraperitoneally with graded doses of methyl parathion at 1.5 to 3 mg/kg body weight for 15 days from the day of estrus. Results indicated that the methyl parathion treatment showed irregular estrous cycles, affect the duration of each estrous cycle, proestrus and diestrus were significantly changed in 2.5 and 3 mg treatment groups. But there was no significant change in the number and duration of each estrous cycle, duration of proestrus and diestrus in 1.5 and 2 mg methyl parathion treatment groups. However, there was a significant decrease in the duration of estrus, while there was no significant change in the duration of metestrus in all methyl parathion treatment rats when compared with those of the corresponding parameters of the control. There was no significant effect on number of live pups on day 1 and 5 except in 3 mg methyl parathion treatment group where it was significantly decreased. There was no significant change in reproductive indices like pregnancy, parturition, live birth and viability in all the methyl parathion treatment rats except the viability index in the highest dose.
AuthorsS M Sortur, B B Kaliwal
JournalIndian journal of experimental biology (Indian J Exp Biol) Vol. 37 Issue 2 Pg. 176-8 (Feb 1999) ISSN: 0019-5189 [Print] India
PMID10641139 (Publication Type: Journal Article)
Chemical References
  • Insecticides
  • Methyl Parathion
Topics
  • Animals
  • Estrus (drug effects)
  • Female
  • Insecticides (administration & dosage, toxicity)
  • Litter Size (drug effects)
  • Methyl Parathion (administration & dosage, toxicity)
  • Pregnancy
  • Rats
  • Rats, Wistar
  • Reproduction (drug effects)

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