Congrats on this exciting time! Just remember that it can take a lot longer than you think to get pregnant. Don't be discouraged if it doesn't happen in your ideal timing. Just have fun.
I cruised
DCL Fantasy with my one year old son. I am now about to go on another DCL cruise in April with my then 2.5 year old son & 1 year old daughter. I have also cruised pregnant twice, one babymoon & the other when my son was 1 year old.
I LOVE DCL with babies. They have the best options for babies. I'll start with the negative first.
No pools for the babies, but that's on ANY cruise ship. However, DCL offers splash areas on all 4 ships for diaper wearing guests. Fantasy & Dream's splash areas are far superior- bigger & offer a lot more but allow older kids in too. On the Magic & Wonder the splash area is smaller & doesn't have much but only allows under 3. That's it. That's my only negative.
Now the positives & my experiences.
The nursery. It's awesome! Use it for sure! We book the nursery for each evening during dinner time so my husband & I can enjoy dinner and they can enjoy playing. We either order them room service & feed them while we get ready or we send them with food. (We prefer late seating so they're not in there during dinner time) We also book it so we can go do fun excusions that are far from baby friendly. The staff in the nursery are incredible. They are so great with the kids and make you feel so at ease. They will do whatever you want. Feed them, change diapers, play with them, put them down for a nap, or even change them into pajamas and put them to "bed" (in the nursery cribs). They contact you through the wave phone provided in your cabin to let you know how your little one is doing. They're fantastic! We were even surprised with an envelope of printed pictures of our little guy with some of the characters during story times during the week. We had no idea he was meeting characters- and in such a fun way! They feed them snacks like animal crackers, bananas, yogurt, and milk. Also, around 5:30pm dinner is served. Or you can send them with your own food for breakfast, lunch, dinner, snacks...
DCL also has special events for little ones like a baby crawling race, open times for parents to play with their kids in the nursery, dance parties with Disney Jr. characters and other play times with the cruise director's staff.
The waiters are amazing with them. They'll purée foods for them. Cut up their food for you. Cut up YOUR food for YOU. And some even help to feed them. Amazing.
Your room steward provides you with anything you could need for your room. Play pens, guard rails, diaper genies, bottle warmers & sterilizers. And they take care of it all...closing up the playpen during the day (if you want), emptying the diaper genie...etc. awesome! Also bathtubs!! Only ships with bathtubs. So great!
As for excursions. We either put them in the nursery & go do something adventurous without them or we do dayrooms or daypasses at hotels so they can enjoy a pool(!) and the beach and we still have all the comforts needed.
Castaway Cay has free wagons for the beach. The ship lends strollers for your entire cruise for free ($200 refundable security deposit).
I'll be posting a baby specific trip report when I return home in May since I searched the Internet relentlessly looking for any baby specific info I could get before our first cruise with our little one.
We travel a lot- our son's first trip was when he was 3 months old and by far, the most relaxed travel we've had since having him (and our daughter) was our cruise. Also, Disney World is great with little ones! The baby care centers are incredible and best of all, they're completely free until 3 years old. They won't remember it but picture & videos will help & they enjoy it so much! We're going two days before my son turns 3 & he's still totally free even though he'll be three during most of our trip since he will be two when we check in & that's how they do it. His first trip was to Universal at 3 months old and he went to Disney at 1 & 2. My daughter's first Disney trip was at 6 months old. The younger they are the easier they are to travel with (while they're in diapers. It's much easier when they are older & out of diapers, no nap times, etc, but with babies, the younger the better!). Then add that they're free! For us, it totally makes sense to travel just like we did before they arrived.
Good luck!