A simple blood test can tell you if your iron levels are getting too low in pregnancy, usually if your eating a couple of serves of lean red meat a week that should be enough to maintain your levels, but if your unsure, have them check them through the blood test, being anemic in pregnancy can lead to post partum hemorage etc so its best to be sure, always take them with food and drink plenty of water and add abit of extra fiber to your diet to help with any consitpation issues that may arrise from taking the suppliments
I was told not to take with food especially dairy. Because it will be hard for body to absorb that way..