The Empress and The Sun would be my guesses for pregnancy indicators. Haven’t actually pulled them in that context, though.
The only fertility-adjacent reading I ever did was for someone post-miscarriage, trying to decide whether to go for it again. Tough spot. I just told her that’s her call to make. Cards can only do so much there, and some decisions really aren’t mine to weigh in on.
But there was a funny moment: I was using my moonology oracle deck and a Libra card came up, and she pointed out the scales looked like a uterus lol. Sometimes the universe just has a weird sense of humor with these readings.