oestrogen

1.oestrogens and androgens are easily interconverted in the laboratory.

在实验室里很容易让雄两种激素互相转换。

2.Pyometra is prevented, either due to the removal of the organ (when ovariohysterectomy is performed) and/or because of the lack of female sex hormones (oestrogen and progesterone) after spaying.

积脓是可以防止的，在拿（绝育）之后。因为很少的女荷尔蒙会产生在绝育之后。