ABSTRACT
Abstract Purpose: To evaluate the effects of enoxaparin and unfractionated heparin (UFH) administered in prophylactic and therapeutic doses on fetal vessels in healthy pregnant Wistar rats, according to Doppler velocimetry measurements. Methods: Fifty animals were assigned to one of five groups: controls (saline), prophylactic and therapeutic enoxaparin (1 and 2 mg/kg/day, respectively), and prophylactic and therapeutic UFH (72 and 400 UI/kg/day, respectively). Uterine horns were examined by ultrasound for identification of live fetuses. A sample of these fetuses underwent Doppler velocimetry. Spectral curves, peak systolic velocity (PSV), pulsatility index (PI), and resistance index (RI) of the middle cerebral artery, ductus venosus, and umbilical artery were investigated. Differences were considered statistically significant when p<0.05. Results: No significant differences in PSV, PI, or RI values were observed among the groups. Conclusion: Doppler velocimetry measurements revealed no significant effects of enoxaparin or unfractionated heparin on fetal vessels in pregnant Wistar rats.
Subject(s)
Animals , Female , Blood Flow Velocity/drug effects , Heparin/pharmacology , Enoxaparin/pharmacology , Middle Cerebral Artery/drug effects , Fetus/blood supply , Anticoagulants/pharmacology , Umbilical Arteries/physiopathology , Pregnancy , Weight Gain/drug effects , Ultrasonography, Prenatal/methods , Rats, Wistar , Echocardiography, Doppler, Pulsed/methods , Middle Cerebral Artery/physiopathology , Models, Animal , Uterine Artery/physiopathologyABSTRACT
PURPOSE: To evaluate the effects of exposure of enoxaparin and unfractionated heparin (UFH) in prophylactic and therapeutic doses on the fertility rates of pregnant healthy Wistar rats. METHODS: Enoxaparin and UFH were administered in prophylactic doses 1 mg/Kg/day 72 UI/Kg/day, and in therapeutic doses at 2 mg/kg/day 400UI/Kg/day. The rats were divided into five groups. The number of live and dead foetuses was quantified. The uterine horns were dissected and the presence of early and late reabsorptions (abortions) was determined. A p<0.05 was considered statistically significant. RESULTS: We did not observe statistically significant differences between groups when comparing the average weight of the foetuses and placentas, rate of female VS males, rates of pre-implantation loss (RPL), rates of efficiency implantation (REI), rates of post-implantation loss (RPIL) and rates of foetal viability (RFV). CONCLUSIONS: There was no significant effect on fertility with the use of anticoagulant drugs in pregnant healthy Wistar rats. .