She will stay a little chunky because female Yoyos are thicker through the body anyway. She will just re-absorb the eggs most likely. When I had mine she would rock on her tummy she was so fat but she was still very active. They would go up and down the tank in front of the cat and my husband said thats how they got their name..... because they were always yoyoing around. LOL
With loaches(and most fish I guess) there are breeding triggers (cooler water, lots of protein, large water changes, weather changes etc.) and theres just not a lot known about what they are. There is a book how ever about Loaches called "Loaches : Natural History and Aquarium Care"
http://www.amazon.com/Loaches-Natura...8326357&sr=1-1
This book from what I've heard is wonderful. This is on my Christmas list

Carol