@OrionsCeiling gave you good information… If a female plant gets stressed out it can start to Hermaphrodites. The plant will start to make Pollen Sacs… These seeds are not what your looking for… If you see pollen sacs you want to remove ASAP… Here is a readme on it
This is how to make Feminized seeds
To make reg seeds that is easy just need male pollen on Female buds…