Hi! Sorry you're going through this. I know how much stress and anxiety it can cause. At my 20 week anatomy scan they discovered an isolated soft marker which led to TONS of testing as this particular marker could indicate many different potential problems from serious chromosomal issues to cystic fibrosis to an infectious disease. It took nearly a month for all the results to come in and it was torture! The last results to come in were for cystic fibrosis- which is also an inherited recessive disease like the disease you're referring to. As it turned out, like you, I was a carrier and then had to wait and see if my husband was. If he was, the baby then had a 25% chance of inheriting the disease. Fortunately he isn't, so we are in the clear. Our genetic councillor said it is extremely rare for both parents to be carriers. And keep in mind, cystic fibrosis is SO much more common than achondrogenesis.
Have you had scans done? From what I've quickly read there are obvious physical indications of this very rare disease that show up early on ultrasounds. I also read that it affects approximately 1 in 40,000 births. It is so incredibly unlikely that your baby has this disease. I know it's easier said than done as news like this is always jarring, but try to focus on the statistics and odds that are incredibly positive in your favor!
Sending you lots of happy thoughts! Try to relax and keep yourself busy over the next week or two as you wait for your husbands results. 💖