CALCIUM AND IRON

I've been taking calcium and iron everyday at the same time for almost 5 months. Just found out today na hindi pala dpat pinagssabay. ? is it related sa pagkkron ng short femur/legs ni baby. Wala ba tlaga ako and si baby naabsorb everytime na iniinom ko ng sabay? ?? im on my 37 wks na today and now ko lang nalaman yun, hindi nabanggit ng OB ko. ??