But in a new Q&A with ELLE, the 34-year-old reality superstar explains that being a mom has actually given her more confidence to pull off some sexier styles.
"I mean at the beginning, when you're losing your pregnancy weight you don't really know how to dress, so that just doesn't count. You just dress as simple as possible," she explains. "But I think since I've gotten in shape, and I feel good about myself, I dress I think sexier now than I did before."
She also claims she cares less about keeping her look flawless.
"I mean, I used to love to wear makeup all the time, and I still do, but at home, you know, you can't really kiss and snuggle and do everything you want to do ... it's just all bets go out the door when you're with your baby because anything could be spilled on you," she says. "And you just don't care, where I would've cared before I had my own children. Like if my nephew just came in and spilled something all over my couch, I would've been like 'Wait, Kourtney, hello, what are you doing, clean this up.' And now I'm like, 'I get it. I get it.' All moms have a past."
Kim also dishes that just like her, North West loves makeup and is the ultimate "girly-girl."
"She grabs my purse, and that means she wants my makeup bag, so I give her my makeup bag and it's empty. And if I just turn around for one second, she has my lipstick like all over her face," she shares. "So I have to give her her own little makeup bag. She's obsessed with makeup and watching me get ready and getting ready herself. She just loves the process, she could not be more ultimately girly-girl."
But though her life is now dominated by her adorable baby girl, Kim also explains how she purposefully made her relationship with husband Kanye a priority after giving birth -- which includes making sure they have plenty of alone time in the bedroom.
"I was really strict about my daughter sleeping in her own room, and now she's really independent and likes it that way. ... And that has allowed us to have our time together," she reveals. "I made it a priority that I knew as soon as the doctor said I was able to work out, I was going to focus and commit myself and really work out, and feel good about myself. So I always gave myself time."
She also has this important piece of advice for other new moms.
"I can totally see how you can get wrapped up in making your child 100% of your time. But if you could just take 5% or 10% for yourself a day, it won't just make the difference in your confidence, but also your sanity," she says. "I mean there are times where sometimes I couldn't even wash my hair if I didn't have help. I couldn't even figure it out. ... But just from me speaking, it worked for me to be able to get my work out in, make me feel good about myself, put my daughter down to bed at a decent time, and have the night with my husband."
In January, Kim talked to ET about her struggle to get rid of her 15-pound weight gain. Watch below: