Noticed my male swordtail harrasing the female allot lately. She looks like she is getting fatter so I think shes about to have babies =) could be wrong tho, is that a sign of "fish courtship"?
sword tails harrasing eachother (male to female)
- Thread starter Bobdolemite
- Start date
Courtship would be one way to describe it, although it is abit one sided. Every male livebearer seems to increase interest in a particular female when she is getting close to birthings. Females do store sperm but the freshest donation would be used for the next pregnancy. The males just don't wait till the current batch is out of the oven even though it would be less stress on the female if they did.
tricksterpup
It's SPRING!!! BUNNIE RABBITS
Yeah bob, the best thing to do is keep your sword tails in trios a 1:2 ratio. Less stress for eveyone that way. 
Also try to put plants (live or fake) into your aquarium so the female swordtail can have a retreat or hiding place. You can also make hiding places out of rocks or bogwood, just make sure the rocks won't topple over so they won't crush your fish.
I would get another female. The plants not only would give the female place to hide they would give the fry a place to hide as well. a second female would give the male another fish to chase.