You have to look at the body type of 1200 gram girls. There are some that have good muscle mass versus skinnier animals. Personally i dont breed till they are 3 and in the 1500 gram range or bigger. You have to ensure they are sexually mature as well are big enough. The 1200 gram rule isnt always a good gauge. If a girl is 1200 grams but.not sexually mature then it doesnt do ya any good. For example i have a mojave hypo girl that was hatched in june 2010 and she is already 980 grams. Shes a friggin pig. Even though i know shes gonna be big enough next year shes not in the plan till 2013. By then she may be a ton lol. Also i have found that guys that breed their snakes early and light tend to have those same animals not breed the next year so i wouldnt push it. I like big big girls. Ive got some over 3500 grams that are crazy good producers of large clutches. They are 8 to 11 egg girls. They never bred till they were 3 so i stick to that guidline for my girls