Is your pet attuned to your pregnacy?

My older male cat has always been attached to my hip since I adopted him. Lately, I feel like he's been different and even more cuddly. My foster cat has also been super close to me. Ever since last week, I have been waking up out of my sleep and using the bathroom around 12:30am. Of course my cats, no matter if they are upstairs or down always find their way to hang out. But nowadays they keep sniffing the toilet bowl as I (TMI) pee. One or both then proceed to come lie on my stomach for the rest of the night. I really feel like they are sensing my pregnancy and it's entirely adorable! Has anyone has good(or bad) experiences with pets or even just animals in general with their early pregnancy?