To compensate, the hormone progesterone acts as a respiratory stimulant, making the pregnant woman breathe faster so both she and the baby can both get enough oxygen with less lung capacity.

作为弥补，黄体酮激素发挥了呼吸兴奋剂的作用，它使孕妇呼吸加快，让她和胎儿在肺活量减小的情况下，也可以得到足够的氧气。