We all have two copies of our genes, one from mom and one from dad. Sickle cell is an autosomal recessive disorder, meaning it takes two "misspelled" genes to cause disease/symptoms. If you are a carrier you have one misspelled gene, so you have a 50/50 chance of passing that misspelled gene to each of your children. Since your husband isn't a carrier, he has a super low chance of passing on a misspelled sickle cell gene. Since your children probably won't inherit two misspelled genes, they have <1% of having the disease. But because they have a 50/50 chance of inheriting a misspelled gene from you, they have a 50% of being a carrier themselves! Things really change if your husband is a carrier too. Hope that helps