Reproductive steroids in the white-tailed deer (Odocoileus virginianus borealis). II. Progesterone and estrogen levels in peripheral plasma during pregnancy.
Reproductive steroids in the white-tailed deer (Odocoileus virginianus borealis). II. Progesterone and estrogen levels in peripheral plasma during pregnancy.
复制标题
白尾鹿（Odocoileus virginianus borealis）的生殖类固醇。
作者：
E. Plotka;U. Seal;L. J. Verme;J. J. Ozoga
采用放射免疫法测定了15只白尾鹿176份血清中孕酮和雌激素的含量。这项研究跨越了两年，其中一些人在两次怀孕期间都进行了连续取样。第一次发现发情前的黄体酮水平低于！除发情前20 ~ 11天为1.6±0.98 ng/ml （X±S.E, N = 4）。雌性激素水平在繁殖前的秋季相对稳定在6.3±0.9 pg/mi （X±S.E, N = 26）。1973年妊娠期平均孕酮水平为5.5±0.2 ng/ml (N = 59)， 1975年妊娠期平均孕酮水平为9.3±0.6 ng/ml （N = 34）。两年内孕酮水平均无显著变化，但各年之间差异有统计学意义（P<0.001）。黄体酮水平在年内个体间基本一致，但部分动物间差异显著（P<0.005（1973）和P<0.025(1975)）。当孕妇怀有更多胎儿时，她们的黄体酮水平往往会更高。在接近分娩的动物中，黄体酮水平似乎有所下降。雌激素水平从产前12周时的16±12 pg/mi增加到分娩时的154±11 pg/mi。雌激素水平在不同年份之间没有差异。雌激素和黄体酮水平在分娩后急剧下降。胎数与雌激素水平没有关系。
Progesterone and estrogens were measured by radioimmunoassay in 176 serum samples from 15 white-tailed deer during the breeding season and pregnancy. The study spanned two separate years in which some does were serially sampled during both pregnancies. Progesterone levels before the first detected estrus were below! ng/ml except for the period 20 to 11 days before estrus when the level was 1.6 ± 0.98 ng/ml (X ± S.E., N = 4). Estrogen levels were relatively constant at 6.3 ± 0.9 pg/mi (X ± S.E., N = 26) during the fall prior to breeding. Mean progesterone levels were 5.5 ± 0.2 ng/mI (N = 59) during the 1973 pregnancy and 9.3 ± 0.6 ng/ml (N = 34) during the 1975 pregnancy. The levels of progesterone did not change significantly within pregnancy period either year but were significantly different (P<0.001) between years. The level of progesterone was consistent in individual animals within year, but differed significantly between some animals (P<0.005, 1973 and P<0.025, 1975). Progesterone levels tended to be higher when does were carrying more fetuses. Progesterone levels appeared to decline in the animals sampled close to parturition. Estrogen levels increased from 16 ± 12 pg/mi at 12 weeks prepartum to 154 ± 11 pg/mI at parturition. There was no difference between years in estrogen levels. Both estrogen and progesterone levels declined precipitously after parturition. There was no relationship between the number of fetuses carried and estrogen levels.