Eric called the clinic first thing the next morning and 10 minutes later, he and Josh were on their way. Both were too scared of what they were about to learn to say much.
They were quickly shown into an examination room and Dr. Andrews appeared a moment later. The stress was visible on his face, and he skipped the usual pleasantries.
"Look, there is no easy way to say this, so I am going to come right out with it: it appears there was a mix-up with the stem cell treatment. You were given an injection from the wrong vial."
"What do you mean, 'the wrong vial'?" Eric asked.
"As you know we are running several experiments here and the vial we drew stem cells from was not part of the masculinization project."
"So... what was it?" Josh asked, slightly irritated at the build up.
"It was from the reproductive regenesis project. That project is designed to restore fertility to women who have had their uterus/ovaries removed for cancer treatment. It works by triggering the body to regrow their lost organs."
"Does that mean I'm... growing a uterus? Inside of ME?" Eric stuttered out.
"Truthfully, I don't know. These cells have never been implanted in a male, let alone a human, before so we can only speculate at this point. We'll run some blood work and get you some scans to confirm what's happening. I will say that... well... err," Dr. Andrews looked towards Josh.
"It's okay, whatever you have to say, you can say in front of my son," said Eric.
"Well the sudden expression of female sex hormones would be consistent with some of the... symptoms... and feelings you have indicated to me before."
"What does this mean overall... for me? Am I going to... die?" Eric squeaked out and Josh reached out for his hand.
"No, I would not go that far. I'm not worried it will prove a fatal mix-up. It's more just... we don't know what to expect. For now, I'm going to draw some blood and get an ultrasound setup in the next room."
Eric and Josh followed Dr. Andrews, exchanging glances of concern. Dr. Andrews had Eric remove his pants, leaving on his underwear, and lay back on the exam table. The cold gel poured onto Eric's stomach made him shiver.
Both Eric and Josh stared intently at the monitor as the doctor moved the probe, stopped, moved it again, and fiddled with the knobs/buttons. They had no idea what they were looking at, but Dr. Andrews stared with such concentration that they waited for him to break the silence.
"This is, quite frankly, more remarkable than I could have imagined," Dr. Andrews finally said.
"Remarkable... good or bad?" Eric asked.
"Remarkable scientifically. You indeed have developed a uterus and at least one ovary is clearly visible, roughly in the position we'd expect it in a female."
"You're... joking right?"
"No. Obviously there is only so much I can tell from this kind of scan, but the image is textbook."
"But wait, I don't have a vagina. Am I going to develop one?!" Eric asked in horror.
"I have a hunch on this, but to confirm I need you to take off your underwear. Maybe your son should step outside?"
It felt like an ironic ask, given Josh had just been inside his dad, fucking him senseless, nearly 48 hours prior, but obviously that was not something Eric was going to reveal. He nodded at his son.
"I'll be right outside dad."
Eric took off his underwear and Dr. Andrews guided him onto his hands and knees. Just over 24 hours ago, Josh had him in that exact same position, but it was a much more pleasurable experience.
Dr. Andrews put a different gel on one hand and eased two gloved fingers into Eric's asshole as the ultrasound probe pressed up against his lower abdomen. Feeling the firm fingers inside him, Eric's cock sprung to life, bumping up against the probe and Dr. Andrews's other hand. He must have been hearing things, because he thought he heard Dr. Andrews let out a little moan of excitement.
A third finger entered Eric's hole and he felt the doctor exploring his insides, fingers going in and out and rotating. Externally, Dr. Andrews moved the probe around, his fingers rubbing up against Eric's hard cock. Suddenly, the fingers in Eric's ass met a spot Eric had no idea existed, causing him to catch his breath as an orgasm overwhelmed him. Ropes of cum painted the exam table as his hole clamped down on the fingers inside his ass.
Eric finally relaxed, breathing heavily as the doctor removed the probe and his fingers. Dr. Andrews made no comments but he winked as he took off his gloves and handed Eric a towel while he washed his hands. When Eric had cleaned up, Dr. Andrews had him to put his clothes back on and invited Josh to rejoin them.
"So what's up? What did you find out?" Josh asked with apprehension in his voice.
"In medical school, you learn that the body is full of mysteries and capabilities to adapt. We have no exception here. Eric, you asked if you were going to grow a vagina. Well, you kind of already have. The new uterus has merged into the very end of your digestive tract, causing your rectum to take on a hybrid vaginal/rectal form."
"That's... what?" Eric turned to his son who looked as confused and in shock as he was.
"So what is my dad supposed to do? Can you remove everything and put it back to normal?"
"Potentially, but for now it's too soon," Dr. Andrews replied. "We can remove the reproductive organs in another few months when we're sure they're fully done developing. Any sooner and there's a chance they'd just regrow again. "
"So I'll be like this for a while then? Will there be other changes? Am I going to grow breasts?" Eric asked.
"No, I would not anticipate more external changes. The treatment was developed focusing specifically on the reproductive tract. Restoring fertility. Luckily that shouldn't be an issue since you're not having receptive anal sex, otherwise I'd have to caution you about well... pregnancy," Dr. Andrews said.
Eric and Josh turned to each other with panic running through their minds. How many loads had Josh pumped into his dad that past weekend?
