The female will store the sperm from the males that she copulates with until her follicles are big enough to fertilize - when they reach that size she'll push them into the oviducts for fertilization - they kind of get jammed up in there and that big lump you see for about 24 hours is the jammed up follicles - we call this ovulation. If you see her ovulate you'll know she is gravid. There are several signs you can look for to tell which phase of her reproductive cycle she is in - Markus Jaynes has a great web page that has an outstanding pictorial guide www.ballpython.ca/gallery/breeding.html

Good luck.
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Tosha
JET Pythons

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