What I will say is pregnancy is pretty important to the story, especially for one particular person. I think it is pretty clear who the pregnant lady is and if you haven't figured it out I think I am getting bad with my clues. Now, I will say that as a vampire you can not get pregnant or make someone else pregnant. So, anyone who came into the story after the MC was turned is off the table for pregnancies. Sorry Sylvia fans. Now it is pretty clear based on the conversation between Eve and Lilith at the church that someone is pregnant and that person is very important. This is a long story and that pregnancy with go full term to adulthood. Yes, there are time jumps.
Now the million dollar question is how many girls are currently pregnant. My answer is depending on your path at least 2, but maybe even more. All I will confirm is that Alexis, Cassie, Charlotte and Rowen are not pregnant.