孵卵期 meaning in English

brood time

Female birds have a special type of bone , called a medullary bone , that grows in their limbs when they are laying eggs , forming a layer inside the hard outer bone
骨髓骨富含形成卵壳的钙元素。当雌鸟进入孵卵期时，骨髓骨开始在翼处发育，并在坚硬的翼骨外层下形成一层。
Yes , they ve sat themselves to skin and bone , he said . an now they re not all that anxious to come out an feed . there s no self in a sitting hen ; she s all in the eggs or the chicks
“是的，它们孵小鸡孵到只剩一张皮一把骨了，现在，它们全不想出来和取食了，一只孵卵期的母鸡是没有自我的，它整个身心都为了它的卵或小鸡。 ”