I do not believe it occurs in Burmese. Females laying infertile eggs a fairly common occurrence I think.
Environmental fluctuations (photoperiod, humidity, temperature, barometric pressure) and similar (other Python sp./ssp.) male pheromones near by (same room/same building) could induce ovulation.
jsc
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"As hard as I've tried, just can't NOT do this"
John Crickmer

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