Folic acid is one i think is important. Taking it reduces the chance of bub having spina bifida or another spinal cord issue. It is included in the pre pregnancy multivitamins OR you can buy it singularly from the chemist. I think i paid around $5 for 100 tablets and took one tablet each day.
Yeah, I noticed the Blackmores conception vitamins are $40 for what looks like a months supply, I was like, dayum........