Effect of administration of L-tyrosine and L-carnitine on onset of puberty in rabbits

The present study was conducted on 72 New Zealand white rabbits assigned into two age groups] two and three months]: 36 rabbits for each group of the same age [18 males and 18 females]. For treatment, 24 rabbits [males and females] were given orally a single dose of L-tyrosine, 100 mg/kg body weight; the other 24 rabbits [males and females] were given a daily oral dose of 1 gm L-carnitine/kg. The other 24 rabbits were left as control. All rabbits were kept under complete observation during the experimental period and data obtained were statistically analyzed. There was a steady increase in the body weight with advancement of age; it seemed to be similar for males and females. The treated group revealed a significant higher body weight [P<0.05] when compared to control and treated females, exhibited higher body gain than males. In the treated group, the testicular descent in males and the first onset of male acceptance by females occurred much earlier during the second month of age compared to control. Successful mounting and ejaculation of semen containing spermatozoa for the first time was recorded in the treated bucks at the beginning of the third month of age, much earlier than in control. Testes and ovaries size increased significantly with advancement of age. L-tyrosine and L-carnitine treated groups revealed significant increase in the testicular and ovarian size compared to those in the control group [P<0.01]. It could be concluded that L-tyrosine and L-carnitine, both act as growth promoting factors. They could be used in rabbits for enhancement of puberty in both males and females

Micro-organisms isolated from the buffalo-cow genital tract in Behera province

ABST Genital tract mucous was aseptically collected from 56 buffalo-cows [37 postpartum and 19 with endometritis and pyometra]. The microbial flora was isolated and identified. The microbial species and the incidence of each organism were tabulated and discussed

placenta of Egyptian baladi goats

Ovariohysterectomy was performed in order to collect the gravid uteri and their contents from ten healthy Egyptian Baladi goats during different stages [early, mid and late]. The removed whole uterus was weighed and the ovarian structures were observed. The weight of the fetal membranes was taken and the placentomes number, size and arrangement in the gravid and nongravid uterine horns were studied morphologically and histologically. The feti were collected and their location in right and left uterine horns were assessed. The weight, Crown-Rumplength [CRL] and umbilical cord dimensions of each fetus were estimated

Postnatal development of hypothesis adrenal and thyroid glands in male buffaloes

The postnatal growth and development of the hypophysis, adrenal and thyroid glands in36 buffalo buil-calves were studied from first to twelfth month of age. The growth of the hypophysis and adrenal glands was characterized by slow weight increase till 8 months of age and more rapid between 8 and 12 months. Growth of the thyroid gland was rapid up to 4 months and slowed thereafter. The small increase in weight gain between 1 and 12 months of age suggested considerable prenatal growth of the studied endocrine glands. Differences in weights of the right and left adrenal and thyroid were detected with tendency of the left side being heavier and bigger than the right one. The changes in the dimensions of the studied glands and its effect on the shape were also considered

Postnatal growth of male accessory genitalia in water-buffalo with special reference to puberty

The postnatal growth and development of the excurrent ducts epididymis and ductus deferens], accessory glands vesicular and prostate glands], pelvic urethra and penis of buffalo-bull had been studied in 36 male calves. Monthly three animals were slaughtered from first to twelfth month of age and their genital organs were collected. From the postnatal growth rates of the different genital organs studied it was evident that the period of maximum growth varied between 40 and 48 weeks of ages. Several evidences has been established indicating attainment of puberty in buffalo-bull by age 10 to 12 months. The postnatal development of the penis of the buffalo-bull was studied and results indicated that its size was less than the size of the bull penis and the reverse was true concerning the size of the glans penis. Glans penis freedom from penile prepuce commenced at 8 to 10 months of age and completed by 12 months age