How much iron does us pregnant women need to take a day?

Vy
Ive been taking Nature Made prenatal vitamin + dha for the past 4 months and im planning on switching to the gummies because the pills are so big and hard to swallow and i always feel gagging right after i swallowed the pill but the only problem is the gummies doesnt have iron in it.So im planning to take iron supplement (the pills are very tiny so easier to take). Ive look for it some bottle shows 27mg some said 65mg.I was wondering what is the requirement iron i should consume a day. Thanks :) 

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