Because there is so many forced matings in several duck species, mallards being the most common example, females actually also have blind alleys that don't lead up to their ovaries and eggs.

因为在几种鸭种中有如此多的强迫交配，野鸭是最常见的例子，雌性实际上也有不通向卵巢和卵子的死胡同。