On average, the bladder can hold around 750 millilitres of urine, or about the volume of a bottle of wine; slightly less in women because of crowding from the uterus - that's especially true during pregnancy.
平均来说,膀胱可容纳约750ml尿,或约一瓶酒的体积;女性膀胱因为子宫的压迫,容量略小,这一点在妊娠期间尤其明显。