Sexing tarantulas can be a tricky task. With slings it is much harder since you have to be able to use its most recent molt and look under a microscope. With larger specimens it's much easier to spot with the naked eye. I'll use my pic as an example. You see the little flap that's circled? that's the spermathecae where the female holds the sperm after mating so this G. rosea of mine is a female. No flap = male.
You're welcome.
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