ABSTRACT
Effects of aqueous seed extracts of Sphenostylis stenocarpa on the reproductive indices of male rats were investigated. A total of 104 adult rats were used for the experiment, and were divided into 4 groups (group A – D) and replicated in triplicate. Group A served as the normal control, while groups B, C and D received three graded doses (800mg/kg, 1200mg/kg and 1600mg/kg) of the extracts, respectively, by oral intubation. The gonad characteristics, sperm parameters and hormonal analyses of the male rats were determined using standard procedures. These were ascertained prior to the commencement of treatment, and on weekly basis. Data were analyzed statistically using SPSS and R software at 95% confidence interval. An overall dose and time dependent showed significant differences in the mean weekly gonad characteristics of the male rats in the treatment groups when compared with the control. There was a significant reduction (p < 0.05) in the body weights of the male rats, but a significant increase (P < 0.05) in the testes weights, gonad somatic index, sperm count and sperm motility in the rats. The gonadal hormone testosterone, responded to the plant extracts, while follicle-stimulating and luteinizing hormones were largely undetected. There were significant increases in the testosterone levels of all the treated rats. Conclusively, aqueous seed extracts of Sphenostylis stenocarpa seems to possess ability to enhance reproductive health in male rats.
ABSTRACT
Several toxic effects of crude oil and some of its products on reproduction have been reported. High rate of child malnutrition and mortality, including increased birth defects and rashes have also been reported in areas impacted by oil development. This study therefore considers the impact of crude oil on reproduction as information in this area is still scanty. With informed consent, blood samples were collected (through the median cubital vein) from a total of one hundred and eighty apparently healthy human subjects (60 males and 30 females) from two locations; Olomoro (an oil producing community) and Owa (a non-oil producing community). Next, socio-economic and educational status of participants where ascertained. Using the Z statistics, student’s t-test and analysis of variance (ANOVA), Statistical measures for such parameters as RBC, WBC, PCV, Total serum protein (TSP), serum Albumin (SA), Haemoglobin concentration (Hb), FSH, Estrogen and Testosterone were conducted. A Significant reduction was observed in Haemoglobin concentration, TSP and SA of subjects in oil impacted community. Also, Significant reduction in number of surviving children, save deliveries and ante natal attendance was seen, along with a significant increase in the number of assisted delivery, still births, complications and gestation periods in oil impacted community, suggesting a poorer maternal and child health indication in crude oil impacted community. Study also observed a significant reduction in WBC, RBC and PCV of inhabitants of the crude oil impacted community.