Serum testosterone, progesterone, and estradiol concentrations and sexual maturation in spotted seals (Phoca largha).

@article{Zhang2014SerumTP,
  title={Serum testosterone, progesterone, and estradiol concentrations and sexual maturation in spotted seals (Phoca largha).},
  author={Peijun Zhang and Yong Yang and Jiabo Han and Zhichuang Lu and Limei Wang and Jiashen Tian and Qinguo Wang},
  journal={Theriogenology},
  year={2014},
  volume={82 3},
  pages={475-480.e4}
}
Spotted seals (Phoca largha) are ice-breeding phocid found in eight different breeding colonies all over the world. They exhibit a seasonal breeding pattern, with annual and synchronous cycles; however, little is known about their reproductive endocrinology. In this study, we measured serum testosterone, progesterone, and 17β-estradiol concentrations in captive spotted seals (simple number: female n = 68; male n = 89) throughout a full reproductive cycle. Males that were older than 4 years had… CONTINUE READING