I have a 16 month old. I was back to rolling 12 hour weeks by the time she was 3 months. Here's how:
Get a trailer. I bought a nice Chariot Cougar. A sweet little set up that was comfy for my little one. I could take her out in hot weather (just leave the mesh so she gets a nice breeze) or in the cold (bundle her up in some Patagonia kiddo down) and she was cozy warm. My wife needed her breaks away from watching the baby, and when she did I came to rescue. I would take Maverick (my girl) out in the Chariot to the local bike trail (not on roads) for a 2 hour spin. Boom, I get my training and the wife gets her break. And Maverick gets a nap in the Chariot, once she got settled and used to it which was only a couple of rides. Not to mention you're pushing higher wattage to pull a trailer like that. It set me up for my best season of racing ever.
I also would do late night rides. Maverick would go down at around 7:30-8:30 and within an hour I was out the door. A 2 hour night ride is good for the soul. Get some good lights.
I have a flexible job where I can take long lunch breaks. I will often go out for a 2 hour ride during lunch.
Commute to work (if you can). Get creative. You'd be surprised at how well a sink, a towel, deodorant, baby powder and some wet wipes works for a shower. I even found a closet that my company would allow me to keep clothes in so I didn't have to lug a backpack every day. Most companies would be thrilled to have an employee that pedaled to work. It's good for their image. If you live close to work, leave early and take the long way in. Or the long way home.
Saturday mornings we have a group ride that leaves out of the local bike shop at 6 am. I leave my house at 4:30 am, ride for 1.5 hours and get to the bike shop for the ride at 6. Then a 3 hour group ride, a 15 minutes to ride home. I've got almost 5 hours in, am home by 9:30, and have the rest of the day with my family.
I don't ride on Sundays. That is church and family time. Except for during race season.
Those rules pretty much still apply today even with her being almost 2 years old. If I feel like I'm pushing my luck with the wife I'll lay off for a while. But sometimes it works great and I'm busting out 18 hr weeks. Which has been ALL THIS MONTH of July!! WOO HOO!!!
Good luck. Be creative. My girl came to really love riding in the Chariot, it's an adventure for her. She gets all pumped up when she sees me putting my team kit on.