妊娠大便不通·脾肺气虚证(gestational constipation with syndrome of qi deficiency of spleen and lung)是指脾肺气虚,健运无权,化源不足,大肠传送无力,以妊娠大便秘结不通,或欲大便而努责艰难,汗出神疲,纳差腹胀,舌淡苔薄白,脉滑无力为常见症的妊娠大便不通证候。