The phrase "male fetus" refers to an unborn baby that is biologically male. It means that the baby has male reproductive organs and will likely grow up to be a boy. Full definition
When Lauc tried to run paternity tests on fetal DNA from the blood of pregnant women, he managed to confirm the paternity of male fetuses by looking for STRs on the Y chromosome. (newscientist.com)
Leffers says that the results of both studies reveal the under - appreciated effects of mild painkillers on sexual development in male fetuses. (newscientist.com)
Women who are carrying female fetuses tend to experience baby brain more than women carrying male fetuses! (checkpregnancy.com)