Steroid metabolism and validation of noninvasive endocrine monitoring in the African wild dog (Lycaon pictus)
Abstract 10.1002/(SICI)1098-2361(1997)16:63.3.CO;2-W The purpose of this study was to validate noninvasive endocrine monitoring techniques for African wild dogs (Lycaon pictus) and to establish physiological validity of these methods by evaluating longitudinal reproductive-endocrine profiles in captive individuals. To determine the primary excretory by-products of ovarian steroid metabolism, [14C]-progesterone and [3H]-estradiol were co-administered to a female and […]
Serum and fecal steroid analysis of ovulation, pregnancy, and parturition in the black rhinoceros (Diceros bicornis)
Abstract 10.1002/(SICI)1098-2361(1997)16:23.3.CO;2-Z Studies were conducted to determine: (1) if fecal hormone metabolite concentrations correlated with serum estrogen and progesterone concentrations, follicular activity and reproductive behavior in the black rhinoceros (Diceros bicornis) and (2) if threshold values of respective fecal metabolite concentrations correlated with pregnancy. Blood and fecal samples were collected, in conjunction with transrectal ultrasound […]
Urinary steroid evaluations to monitor ovarian function in exotic ungulates: X. Pregnancy diagnosis in Perissodactyla
Abstract 10.1002/zoo.1430130205.abs Enzymeimmunoassays (EIAs) for estrone conjugates (EC), pregnanediol-3-glucuronide (PDG), and C-19 and C-21 progesterone metabolites (C-19/C-21) were used to analyze urine samples from four nondomestic equid species, four tapir species, and two rhinoceros species in an attempt to identify if these assays could be used for diagnosing and monitoring pregnancy. The same urine samples […]
Use of urinary biomarkers of ovarian function and altrenogest supplementation to enhance captive breeding success in the Indian rhinoceros (Rhinoceros unicornis)
Urinary hormone analysis was conducted on two adult female Indian rhinoceroses (Rhinoceros unicornis) that exhibited minimal or no estrual behaviors traditionally used to time breeding. Urine was collected throughout two consecutive estrous cycles to establish preliminary data on each individual’s pattern and concentration of estrogen conjugates (EC) and progesterone metabolites (PdG) during follicular and luteal […]