Change swaddle

First of all, congratulations on your pregnancy and good luck 😊 To answer your ques, I used the wrap around style and changed every alternate day, unless soiled. It's better not to use same swaddle for more than 2-3 days for hygiene purposes. Depending on how often do you plan to laundry, you can calculate the number of swaddle you should buy :) Always keep 2 extra for emergency usage though. Never used velcro one so can't comment but upto you if you find it convenient.