The phrase "pregnant females" refers to females, typically animals or humans, who are carrying a baby or offspring in their bodies and will give birth to it in the future. Full definition
High energy food for d is also indicated in some weak and under weight pregnant female dogs to enhance the health status of not only dam but the fetus as well. (dog-health-handbook.com)
However, adults can carry dormant larvae that become active only in pregnant females. (petpremium.com)
The most common spread of the disease occurs when an infected pregnant female cat passes the virus on to her newborn kittens. (scenichillsvet.com)