There is a correlation between babies born with cleft lips/palates and mothers with nutritional deficiencies, specificly B vitamins. You might want to look into taking a high quality prenatal vitamin with bioavalaible vitamins/minerals that has methylated folate and b12 from somewhere like Thorne or Seeking Health, etc. Also you may want to test yourself (and your babies) for genetic SNPs, specifically MTHFR and MTRR. If you or your babies have these mutations you can get around them by taking the methylated versions of folate/b12.