Hi, Nelle is right about the symptoms and it is wise to have a blood test to confirm it then you can take some iron tabs if necessary.

I found I was very dizzy and short of breath, personally. This happened in the last trimester. The doctor tested my iron level and it was low so he told me to get some Fefol. There was an almost immediate improvement.

So don't worry ... if you get that particular complication it is easily diagnosed and remedied.