Hilaria Baldwin has stopped co-sleeping with her baby son

Taking to her Instagram account, the brunette beauty uploaded a photograph of Romeo breastfeeding and she accompanied it with the caption: "I co-sleep with my kids while nursing them. It's usually about a year. I feel very safe with it because Alec and I are both very light, stationary sleepers.

"Romeo has begun to move around much more than my other ones while he sleeps. So I've decided that, for his safety and our sleep, he is going to learn to stay in his crib over night. It is hard...because I'm going to miss this...the cuddling at night. This pic is the last time he was in bed with us...and yesterday was the first night he wasn't in bed with us. It was tough, and there were definitely tears--both his and mostly mine...but I know that everyone has to grow up.

"We will just have to cuddle that much more during the day. (sic)"

Hilaria has always been one to share the highs and pitfalls of motherhood, and last month revealed online that she was "probably experiencing a miscarriage."

She said at the time: "I want to share with you that I am most likely experiencing a miscarriage. I always promised myself that if I were to get pregnant again, I would share the news with you guys pretty early, even if that means suffering a public loss. I have always been so open with you all about my family, fitness, pregnancies...and I don't want to keep this from you, just because it isn't as positive and shiny as the rest. I think it's important to show the truth...because my job is to help people by being real and open.

"Furthermore, I have no shame or embarrassment with this experience. I want to be a part of the effort to normalize miscarriage and remove the stigma from it. There is so much secrecy during the first trimester.

"This works for some, but I personally find it to be exhausting. I'm nauseous, tired, my body is changing. And I have to pretend that everything is just fine--and it truly isn't. I don't want to have to pretend anymore. I hope you understand.

"So, this is what is going on now: the embryo has a heartbeat, but it isn't strong, and the baby isn't growing very much. So we wait--and this is hard. So much uncertainty...but the chances are very, very small that this is a viable pregnancy. (sic)"

The health and wellness coach later revealed there was no heartbeat at her scan.

As well as Romeo, Hilaria and Alec are already parents to Carmen, five, Rafael, three, and Leonardo, two, while the 'It's Complicated' star has 23-year-old daughter Ireland with his ex-wife Kim Basinger.