they are spawners. they dont get "pregnant"
A woman shows signs of being pregnant when she first misses her periods or when the periods are delayed.
Sigh of a female human being in heat
Signs that a pregnant ghost shrimp is about to give birth include a darkening of the eggs, a noticeable increase in the size of the female's abdomen, and the appearance of a saddle-shaped structure on her back. These signs indicate that the female is close to releasing her offspring into the water.
Yes. But they can also be signs that your period is arriving soon
First learn how to spell pregnant
YES!
U get fat u idiot!
If you are pregnant, missing a period after having sexual intercorse shows signs of being pregnant.
As long as the female seems happy and healthy then there is no need to go to the vet - unless you want to be sure that she is pregnant. Bear in mind that some females have phantom or false pregnancies, where she shows all of the signs of being pregnant but does not give birth. Signs include the production of milk and typical mothering behaviour but the female never actually gives birth.
To determine if your female platy is pregnant, look for a dark spot near her back fin, which is a sign of pregnancy. Additionally, her belly may appear swollen or rounder than usual. If you notice these signs, it is likely that she is pregnant.
http://wiki.answers.com/Q/Can_your_boyfriend_show_signs_of_you_being_pregnant"