Some congenital causes of primary hypogonadism are genetic diseases like Klinefelter or Turner syndrome.

可引起原发性性腺功能减退的先天因素包括Klinefelter综合征或Turner综合征等遗传病。

Other ones include a tumor of the pituitary gland and hypothalamus, and congenital causes include Kallmann syndrome and panhypopituitarism.

其他病因还包括垂体或下丘脑肿瘤，而其先天因素包括Kallmann综合征和全垂体功能减退症。

On the full blood count, the mean corpuscular volume, which reflects the size of the red blood cell, is usually normal or low, for the congenital causes.

在先天性铁粒幼细胞性贫血的全血细胞计数中，反映红细胞大小的平均红细胞体积，通常是正常或降低的。

The most common congenital cause is an X-linked form, which means it happens on the X chromosome and affects mainly boys since boys only have one copy of the X chromosome.

最常见的先天原因是伴X染色体遗传，意味着它发生在X染色体上，主要影响男孩，因为男孩只有X染色体的一个副本。