Mary ran out into the cool night air, stripping her nightgown off. The grass tickled her bare feet as she stood on the lawn between the house and the barn, wondering what the random change would transform her into? Her breasts heaved with her excited breaths while her rounded stomach gleamed in the moon's light. She caressed her pregnant human belly for hopefully the last time, knowing that she was giving her baby a better, more carefree life away from that cheating bastard.
As she calmed, opening herself up to the change, Mary felt her breasts begin to ache in a strange way. Pregnancy had brought a lot of new aches and pains, as well as normal human changes to her once lithe body, but this felt ...different. Her bra straps began to feel tight, so she quickly removed it as well as her panties, standing naked on the lawn beneath the moon. She gently cupped her breasts, feeling their weight and warmth and a new... sloshiness? Her breast milk hadn't come in yet, but she knew it was could happen months before your due date... She tugged on her nipples, surprised when twin jets squirted into the night! "Oh wow." she breathed, amazed once again at the evolution and capabilities of the female body. Repeating the action, she soon noticed that the milk gave off a sweet, sort-of earthy smell, and her nose twitched as she craned her neck down to get a better whiff. Were her nipples... longer? They were! And her boobs had definitely swelled - they almost seemed to have pushed out and joined at the middle a bit, almost like an animal's udder! Mary jolted, wondering what sort of creature she was slowly becoming?!
As she continued to support her changing mammaries, she felt her arms being pushed lower, not from a further increase in weight, but she realized that her breasts were migrating downwards. Her chest was flattening as her long nipples and milk-filled bag slid over her swollen belly and came to rest just above her crotch. She now definitely had an udder, and she realized she would soon be nursing her baby from all-fours! Almost immediately following that thought, she felt something release and a gush of fluid ran down her legs to soak the grass below.
"Ohmygosh. Did... did my water just brreak?!" Before panic could even begin to set in, a sharp contraction brought Mary to her knees. Was her baby coming? It was too early! Another contraction squeezed her and left her breathless - there was no time to go anywhere or do anything! The changes she'd enacted were forcing her to give birth right in her front yard! As a third, even stronger contraction racked her body, Mary's face scrunched up, her nose broadening to allow her to take deep breaths to get through the labor pains. She shook her head, feeling something flopping, slapping against her cheekbones with the back-and-forth motion. Opening her eyes, she found her sight distorted, her forward vision somewhat impeded by... her mouth?
Another cramp grabbed her attention, but this one was in her hand. She struggled to focus as she raised her right hand in front of her face, but she couldn't understand what she was seeing: her middle fingers seemed wider, or maybe connected? and much too long... her palm seemed stretched and her thumb, pointer and pinky fingers were shrunken compared to the two center digits. Something black was encasing the tips of those fingers, forming into... Oh! She had a cloven hoof in place of her hand! And she could feel the same change happening to her left hand as well! She felt them dig into the soft, damp ground as another contraction gripped her and she braced her hooves beneath her.
She wanted to squat, the instinct to *push* flooding her brain as she got her feet beneath her, not noticing as her legs shortened, reshaping like her hands and bringing her spine parallel to the ground. Her full udder swung between her hind legs, and something tickled her buttocks as a tail pushed out from the base of her spine, bodily changes finishing up just in time for the birth of her kid. She craned her head to the side, her neck having elongated to make this action more natural, but Mary no longer noticed the changes transforming her body - two tiny hooves were sticking out of her, followed slowly by a little nose and a knobby head before all-at-once her baby slid free, surrounded by the remnants of it's amniotic sac.
Letting out a few bleats of relief, Mary began to lick her newborn, cleaning her of the birth fluids and stimulating her nervous system, rewarded with the strong sounds of her kid's first "mehs, MEh!" The new mother goat nuzzled her kid, exhausted but flooded with protective instincts and love.