Pierantoni R, Iela L, Delrio G, Rastogi R K
Gen Comp Endocrinol. 1984 Jan;53(1):126-34. doi: 10.1016/0016-6480(84)90232-6.
Seasonal plasma progesterone, androstenedione, estrone, and 17 beta-estradiol concentrations in the female Rana esculenta were determined by radioimmunoassay during the 1979 and 1981 seasons. Plasma levels of these steroids were highest just before the first ovulatory wave in spring and lowest after the breeding season. In the 1979 season (during the 1981 season hormones were not assayed in January, November, and December) progesterone, androstenedione, and estradiol levels showed another peak in November-December. During the breeding months, i.e., late March to late June, progesterone, androstenedione, and estradiol levels showed intermittent ups and downs corresponding roughly to the ovulatory waves. In addition, during the breeding season progesterone and androstenedione levels had a higher average in frogs with "ripe" ovaries than in those with "spent" ovaries. Relationships between seasonal steroid levels and ovarian activity are briefly discussed.
1979年和1981年期间，通过放射免疫分析法测定了雌性食用蛙季节性血浆孕酮、雄烯二酮、雌酮和17β-雌二醇的浓度。这些类固醇的血浆水平在春季第一次排卵波之前最高，在繁殖季节之后最低。在1979年季节（1981年1月、11月和12月未检测激素），孕酮、雄烯二酮和雌二醇水平在11月至12月出现另一个峰值。在繁殖月份，即3月下旬至6月下旬，孕酮、雄烯二酮和雌二醇水平呈间歇性起伏，大致与排卵波相对应。此外，在繁殖季节，卵巢“成熟”的青蛙体内孕酮和雄烯二酮水平的平均值高于卵巢“已排卵”的青蛙。文中简要讨论了季节性类固醇水平与卵巢活动之间的关系。
