求翻译：怀孕后准妈妈体内的血红蛋白会增加20%，另外，准妈妈还需要为胎儿储备出生后1～4个月所需的铁，因此对铁的需求量也会相应增加。是什么意思？

Pregnant mothers may increase the body's hemoglobin 20%, In addition, mothers also need to reserve for the fetus after birth, required 1-4 months of iron, so the demand for iron will increase accordingly.

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After is pregnant accurate mother in vivo hemoglobin to be able to increase 20%, moreover, accurate mother also needs to stockpile for the embryo is born the iron which the latter 1~4 month institute needs, therefore also can increase correspondingly to the hard demand.

Pregnant mother body of hemoglobin increases after 20%, while mother also need iron required for fetal reserves 1-4 months after birth therefore also increases demand for iron on.

Pregnant mothers may increase the body's hemoglobin 20%, In addition, mothers also need to reserve for the fetus after birth, required 1-4 months of iron, so the demand for iron will increase accordingly.