Czekala N M, Benirschke K, McClure H, Lasley B L
Biol Reprod. 1983 Mar;28(2):289-94. doi: 10.1095/biolreprod28.2.289.
Urinary estrogen components were separated, identified and quantified throughout the pregnancy of the gorilla (Gorilla gorilla) and orangutan (Pongo pygmaeus) and compared to estrogen levels in normal human pregnancies. Fetal and neonatal adrenals from each species were also compared in terms of weight and relative amounts of fetal zone. The results demonstrate that gorillas and chimpanzees excrete 4- to 5-fold less estrogen during pregnancy than the human and orangutan which are similar to each other. The lower estrogen excretion appears to be related to a smaller fetal adrenal in both the gorilla and chimpanzee which reveal both a reduced adrenal weight and increased definitive to fetal zone ratio when compared to either the human or orangutan.
在大猩猩（Gorilla gorilla）和红毛猩猩（Pongo pygmaeus）整个孕期对尿中雌激素成分进行了分离、鉴定和定量，并与正常人类孕期的雌激素水平进行了比较。还比较了每个物种的胎儿和新生儿肾上腺的重量以及胎儿带的相对含量。结果表明，大猩猩和黑猩猩孕期排出的雌激素比人类少4至5倍，而红毛猩猩与人类相似。大猩猩和黑猩猩雌激素排泄量较低似乎与胎儿肾上腺较小有关，与人类或红毛猩猩相比，它们的肾上腺重量减轻，永久区与胎儿带的比例增加。
