Starting a thread of things to say to your partner roleplaying or fantasizing about them getting or being pregnant. 

Looking to get more creative and descriptive than the usual “I’m gonna get you so pregnant” “I cant wait for you to have a huge pregnant belly”

Feel free to make it as long you want.

As a woman who's into the pregnancy kink, I definitely get off when guys get super possessive, saying things like they want to breed me, and that me having a baby in my belly shows everyone else that I'm theirs.

Any type of possessive/breeding talk is amazing!

I’ll throw in my experiences and ideas.

I've had a few partners with pregnancy kinks and liked to play pregnant and lots with breeding kinks. Most of the time the pregnancy talk would be used for teasing or foreplay.

An example I had a partner who was at Disney with her family and would send me snaps, one of which was her walking around with her whispering to her phone. "I can't wait until I'm waddling around here with your baby in me." Another example was she had a very tall standing mirror and she'd stand in front of it and rub her stomach, when I asked what she was doing she'd say "Thinking about how I'll look when you knock me up." A month into dating she got on birth control. I knew it, but one time during sex she said I should put on a condom anyway. After starting in missionary, she asked me to roll us over so she could ride. I did so, and she slid off of me and reached down and rolled off the condom, when I asked what she was doing, she replied "I want to you fuck a baby into me." Best sex I ever had let me tell you.

Another notable one was a coworker I had who I was with for about a year. She learned early on I had a pregnancy kink and played into it, even doing a full pretend pregnancy. One thing she could do is push out her usually flat stomach to look easily 6 months pregnant. She use to do it as a bit of a party trick but would use it to mess with me, pushing it out and blowing me kisses and winks when no one was looking at her. One time we were in the elevator together alone when she pushed it out and we had a little conversation.
"You're kid is getting huge Bulfinch. I don't know how I'm going to hide it anymore."
"Why hide it? Let everyone know I fucked and filled you and you're mine."
That got a good blush out of her.

Those are just two of the big examples, I found that usually pregnancy talks works best as foreplay, or when she is begging for you to cum in her and get her pregnant at the end. Possessiveness is a plus usually, a 'everyone knows you are mine and you can't hide it.' Had a few like it when I mentioned 'imagine how great your tits are going to look swelled up.' Trick I found is a balance between the gentle sides of it (imagine feeling our baby kicking) to the more breeding and possessive works wonders.

Hope to see others' advice and experiences!

I once had a partner who I met due to my fetish as she was posting on FetLife looking for potential partners. Fantastic experience, we had discussed many times having kids of our own and would occasionally during sex would talk about how good it will be when my kid is inside her. But sadly that never happened. Still a great experience though.

Mine started with just me, but once I told my wife about it, she was off at first and agreed to ware a fake belly I bought awhile ago, now we play all the time, we have a couple different outfits/dresses and even a few hospital gowns. We have played her being in labor, she actually pushed me out of her a few times, and we are also talking about it during sex, I praise her for carrying our baby and let me fuck her during labor. We are actually thinking about buying stirrups and leg straps for them, kind of like a bandage idea, forcing her to keep her legs open and unable to move type thing.