They may not realize it yet, but they are already born. With the babies embracing and cuddling as if they were still in their mother’s uterus, a video of an ᴜпᴜѕᴜаɩ bath is providing an іпсгedіЬɩe glimpse into what life may be like for twins in the womb.

The newborns cling to each other as they float in a basin full of water, with adult hands gently cradling and supporting their tiny bodies.

At one point, water is carefully poured over their foreheads and eyes, while their noses and mouths stay above the surface so they can breathe comfortably.

The bathing technique, called the Thalasso Baby Bath, was invented by Sonia Rochel, a maternity nurse in Paris, France. The twins in the video, a boy and a girl, were just a few days old when they experienced the bath, she told TODAY Moms. Their mother declined to release their names.

The video, which by December 2015 has more than 39 million views on YouTube, was shot in 2013 at the maternity clinic where Rochel works.