I've never experienced a no POS cycle myself, but have heard of it happening, with a successful litter following. BUT, I've never witnessed, or heard of 2 ovulations in one cycle until this last year, and only from reading it online many times. It still baffles me to be honest.
But I have witnessed, on more than one occasion, that some Boas will develop follicles on one side, than on the other at a bit of a later date, resulting in two independent swells (pre ovulation swells). I think this second swell is often mistaken as an ovulation many times, because it's being expected to occur.
I've talked with my vet about this, who bred a few species to help pay for his college, and from personal experience, and a medical standpoint, he seems to think ovulation occurs only once as well.
Sure would like to witness this myself some day. Sounds like an interesting experience if nothing else.
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Richard Carew
Sunset BCI
You laugh at me cuz I'm different! I laugh at you cuz you're all the same.
Stop Inhumane and Illegal Practices