Mine have been locking since late november and have not ovulated yet. They are seeking cool have had a pre ovy shed and are eating and building like crazy and have a glow to them. So its been around 3 months for me and no ovy yet but I think they are close. But from what I hear they is no definative answer to this question, they are all different and go at diff times.
X2
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Collection
0.1 Normal - Merlina
0.1 Spider - Isis
1.0 Pastel - Mars