Ay, congratulations on wanting to expand your family! Honestly, the best thing is to talk to your OB para makita kung anong vitamins ang best for you specifically, bawat mama ay different, especially kung may health stuff or past pregnancies, pero generally folic acid at prenatal vitamins ang standard na ire-recommend nila bago bumuntis talaga. A few of us moms swear by starting prenatal vitamins a few months before trying kasi it really helps prepare your body, and yung OB mo will know your full picture better than anyone online. Good luck, mama!