We have 2 berried females a few days after finding two large molts.
Found this one Saturday
Found this one this morning
Water changes can stimulate molting, cooler temperature of water indicated mostly
Sexually mature, saddled females tend to become berried after molting, which is growing, to accommodate up to 100 eggs per batch...
The female needs to be large enough to hold the eggs.
A sign that the eggs are close to hatching is a new saddle visible in the female. She is producing her next batch of eggs even before the current batch hatches, she will become an egg factory. Neither of ours have saddles yet. 30-45 days is the normal holding time after seeing berries.
If you have male shrimp buzzing around your tank, knocking into stuff like the glass, wood, plants, whatever, it's a good indication that breeding will happen as soon as possible - that behavior is males looking to mate, feverishly.
Clean water, proper parameters, it will happen. Don't overfeed. Don't worry.
Most shrimp can be pretty low maintenance once established.