I present my mpreg model that I made for personal use. It's not perfect but it does a decent job at enhancing existing tags for various prompts related to male pregnancy, inflation, and lactation and such.

I went with LyCORIS over LoRA so it would mix better when combined with style art style LoRAs. The model I trained on is NoobAI XL 1.1 but it works great with Illustrious LoRAs and checkpoints.

V5

This version was trained on both, NAI 1.1 and IllustriousXL

• I realized splitting the concept folders made minimal difference so it's all combined into a single folder and I removed the extra activation tags as they didn't do much in V4.

• Refined the tagging slightly to remove redundant similar concepts and tagging.

• I refined the training settings again (I had Gemini review my config for me) and this version has minimal influence over the generation art style/etc.

The NAI version generally seems to require higher tagging strength than the Illustrious version to have more of an effect but it works well enough.

Recommended model strength is 0.5-0.7 to avoid having it overinfluence the generation when combined with additional models (LoRA and LyCORIS).

The concepts that work well include tags like:

• pectoral expansion / hyper pecs / male lactation

• belly expansion / hyper inflation

• big belly / hyper belly

• obese belly / hyper obese (made it larger and more consistent than before)

• internal view (for an internal view of anal penetration / replaced the cross-section tag but both tags are interchangeable for the same effect)

• cum inside (so the cum is more internal compared to "cum in ass" or "cum overflow").

• impregnation / insemination (interchangeable but I find impregnation tag sometimes tends to be overpowering when combined with internal view tag in the same prompt)

• tentacle in mouth + tentacle in ass

• translucent tentacle + liquid-filled tentacle + white liquid in tentacle

• disembodied penis / penis in ass / penis in mouth
  
  I tried to train it to work for comic / progression panels (to slight success) but it can be temperamental/generate panels in the wrong order so it may take several attempts to get a decent comic/2koma/3koma/etc.

Specific image examples of various focus tags (at different levels of tag strength) have been included.

The settings used for my generation testing were 4-5 CFG, 20-24 steps, DPM++ 2M SDE - Karras on Forge with an adetailer (face_yolov8s).

V4

This version was also trained on NAI 1.1 but will work great with Illustrious checkpoints/LoRAs.

• Split the major concepts into 4 separate datasets (and activation tags) instead of one big mess of a folder. It's not perfect but I was trying to better distinguish the concepts from each other even though they do still overlap within the generations.
  
  mpreg-set (general breast/pregnancy/penetration/belly concepts)
  mp-obesebelly (obese belly and hyper obese concepts)
  mp-fluidtentacle (tentacle concepts)
  mp-com-set (comic concept but has a small dataset to avoid overinfluencing generations)
  

• I refined training settings (I had ChatGPT review my config for me).

• Split the major concepts into 4 separate datasets instead of one big mess of a folder.

• I refined the translucent tentacles concept and it's now VERY consistent. I tried to train the tentacle in mouth to make more than one tentacle but I'm tired of fighting with it so I just stuck with single tentacle training images.

• Improved the quality/style of the internal cross-section view (less 2D/better angles).
  
  Recommended model strength is 0.7-0.8 to avoid having it overinfluence the style you're going for when combined with style LoRAs.

The concepts that work well include tags like:

• pectoral expansion / breast expansion / hyper pecs

• male lactation

• belly expansion / hyper belly inflation

• big belly / hyper belly / obese belly / hyper obese

• cross-section (for an internal view of anal penetration)

• cum inside (so the cum is more internal compared to "cum in ass") / cum overflow

• impregnation / male pregnancy

• tentacle in mouth + drinking from tentacle / tentacle in ass

• translucent tentacle + liquid-filled tentacle + white liquid in tentacle + visible liquid in tentacle

• disembodied penis / penis in ass / penis in mouth
  
  I tried to train it to work for comic / progression panels (to slight success) but it can be temperamental/generate panels in the wrong order so it may take several attempts to get a decent comic/2koma/3koma/etc.

Specific image examples of various focus tags (at different levels of tag strength) have been included.

The settings used for my generation testing were 4-5 CFG, 20-24 steps, Euler A - Karras on Forge with an adetailer (face_yolov8s).

Re-uploaded due to being less consistent on comic prompts without a main activation tag on previous version. This version has the same training set but with an additional activation tag (mpreg-set).

V3

This version was also trained on NAI 1.1 but will work great with Illustrious checkpoints/LoRAs.

• I fixed incorrect training settings so this version can now support a higher strength without being too overtrained.

• Trained a concept for obese belly that won't give fat face/thighs/arms (only affects the belly size).

• Tried to add translucent tentacles with fluid transfer (it semi-works but can be hit/miss).
  
  Recommended model strength is 0.7-0.8 to avoid having it overinfluence the style you're going for when combined with style LoRAs.

The concepts that work well include tags like:

• pectoral expansion / breast expansion

• belly expansion / hyper belly inflation

• big belly / hyper belly / obese belly

• male lactation

• hyper pecs

• cross-section / cum inside / cum overflow

• impregnation / male pregnancy

• tentacle in ass / tentacle penetration

• tentacle in mouth + drinking from tentacle

• translucent tentacle + flowing white substance + white substance flowing through tentacle

• disembodied penis / penis in ass / penis in mouth
  
  I tried to train it to work for comic / progression panels (to slight success) but it can be temperamental/generate panels in the wrong order so it may take several attempts to get a decent comic/2koma/3koma/etc.

Specific image examples of various focus tags (at different levels of tag strength) have been included.

The settings used for my generation testing were 4-5 CFG, 20-24 steps, Euler A - Karras on Forge with an adetailer (face_yolov8s).

V2

This version was also trained on NAI 1.1 but will work great with Illustrious checkpoints/LoRAs. I tried to refine the tagging and removed some excess training images that weren't helping much with the consistency of tags. I did try to improve the cross-section so it better resembles cervical-penetration so penetration goes deeper inside.

The concepts that work well include tags like:

• pectoral expansion / breast expansion

• belly expansion / hyper belly inflation

• big belly / hyper belly

• male lactation

• hyper pecs

• cross-section / cum inside / cum overflow

• impregnation / male pregnancy

• tentacle in ass / tentacle penetration

• disembodied penis / penis in ass / penis in mouth
  
  I tried to train it to work for comic / progression panels (to slight success) but it can be temperamental/generate panels in the wrong order so it may take several attempts to get a decent comic/2koma/3koma/etc.

I've included specific image examples of various focus tags at different levels of tag strength.

Recommended model strength is 0.5-0.6 to avoid having it overinfluence the style you're going for when combined with style LoRAs.

The settings used for my generation testing were 3-4 CFG, 20 steps, DPM++ 2M SDE - Karras on Forge with an adetailer (face_yolov8s).

V1

I focused more specifically on generic tags as opposed to unique tags so it would simply enhance existing concepts/make them stand out more.

Those concepts include tags like:

• pectoral expansion / breast expansion

• belly expansion / hyper belly inflation

• big belly / hyper belly

• male lactation

• hyper pecs

• anal cross-section / cum in ass / internal cumshot

• impregnation

• tentacle in ass / tentacle penetration
  
  I tried to train it to work for comic / progression panels (to slight success) but it can be temperamental/generate panels in the wrong order so it may take several attempts to get a decent comic/2koma/3koma/etc.

I've included specific image examples of various focus tags at different levels of tag strength.

Recommended model strength is 0.5-0.6 to avoid having it overinfluence the style you're going for when combined with style LoRAs.

The settings used for my generation testing were 3-4 CFG, 20 steps, DPM++ 2M SDE - Karras on Forge with an adetailer (face_yolov8s).