Posible b n mgkaron ng birthdeffect ang ipagbbnts na bby kng ang sinundan nya ay my birthdeffect dn?

Not yet preggy pa po mii. But planning to have our 3rd child na sana. 2nd child ko kasi is meron rare disease (down syndrome). Pero 4months after i gave birth namatay din po sya. Kaya takot kami ni hubby na baka matulad sa knya ung plano naming mag bby ulit. Btw, it's been 2yrs na rin.