You can count the segments on the abdomen of a nymph or can look at the adult mantis. Males, if they survive their first mating encounter, may mate again as well Sex determination in adult praying mantises even with adult praying mantises, you first need to know and recognize the differences between the sexes
Praying Mantis Reproduction at Jeraldine Heinrich blog
Since the male mantids become adults more quickly and also require fewer moults, we have a first clue, the size
Female mantids are generally larger and stronger.
Determining the sex of your praying mantis there are numerous differences between male and female praying mantis Most notably, male praying mantis are smaller, timid, much more flighty than females. Learn various ways to identify the gender of your praying mantis and the differences between male and female mantis. In these examples i am using the giant asian mantis (hierodula membranacea) but this can apply to most mantids.i will start with nymphs (non adult mantids)
Counting segments is the best indicator of gender You count the abdominal segments from the bottom Females have six and males have more In females the last segm
Praying mantises typically begin mating in the late summer months, and mating may continue through late fall
Females may mate more than once during this time
