Are you sure she is egg bound? If she is showing signs of straining, lethargy, anorexia, weight loss, etc., she is definitely egg bound and should see a vet ASAP. Sometimes they need an injection or two of oxytocin, preceded by an injection of calcium gluconate. If this does not induce contractions, she may need to have them surgically removed.
When female Leopard Geckos become egg-bound, it is usually because they do not have an appropriate place to lay their eggs, they are calcium deficient (calcium helps smooth out muscles like the uterus), a first-time mama, or is too young or immature to lay.
Sybella suggested warm water soaks... this may help. Gentle (very gentle!) massage of the abdomen using downward strokes with your ring finger can also be beneficial. Make sure she has a hide with moist (not wet) vermiculite, perlite, etc., that she can use without any other gecko hogging it or pestering her. If she is digging in it, she knows what to do and will most likely lay them on her own.
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Marcia McGuiness
Golden Gate Geckos
www.goldengategeckos.com
